Petroleum Science最新文献

{"title":"TOC","authors":"","doi":"10.1016/S1995-8226(24)00320-0","DOIUrl":"10.1016/S1995-8226(24)00320-0","url":null,"abstract":"","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages i-iii"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interwell interference model of horizontal wells in shale gas reservoirs based on multi-connected boundary element method","authors":"Yu-Long Zhao ,&nbsp;Hao-Yan Feng ,&nbsp;Cheng-Zhong Bu ,&nbsp;Li-Sha Zhou ,&nbsp;Jian-Fa Wu ,&nbsp;Lie-Hui Zhang ,&nbsp;Ying-Fang Zhou","doi":"10.1016/j.petsci.2024.08.009","DOIUrl":"10.1016/j.petsci.2024.08.009","url":null,"abstract":"<div><div>Due to the wide application of closely spaced multi-well horizontal pads for developing unconventional gas reservoirs, interference between wells becomes a significant concern. Communication between wells mainly occurs through natural fractures. However, previous studies have found that interwell communication through natural fractures is varied, and non-communication also appears in the mid and late stages of production due to natural fracture closure. This study proposes a boundary element method for coupling multi-connected regions for the first time. Using this method, we coupled multiple flow fields to establish dual-well models with various connectivity conditions of the stimulated reservoir volume (SRV) region. These models also take into consideration of adsorption and desorption mechanism of natural gas as well as the impact of fracturing fluid retention.</div><div>The study found that when considering the non-communication of SRV regions between multi-well horizontal pads, the transient behavior of the targeted well exhibits a transitional flow stage occurring before the well interference flow stage. In addition, sensitivity analysis shows that the well spacing and production regime, as well as the connectivity conditions of the SRV region, affect the timing of interwell interference. Meanwhile, the productivity of the two wells, reservoir properties, and fracturing operations affect the intensity of interwell interference.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 4278-4297"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical calculation and analysis of the velocity of shaped charge jet with modified collapse velocity model","authors":"Kun Jiang ,&nbsp;Shou-Chun Deng ,&nbsp;Hai-Bo Li","doi":"10.1016/j.petsci.2024.06.017","DOIUrl":"10.1016/j.petsci.2024.06.017","url":null,"abstract":"<div><div>The application of perforating completion technology in oil and gas field development has gained widespread popularity. Enhancing the efficiency of oil and gas wells relies on increasing the penetration depth, which is influenced by the design of the perforation charge and the strength characteristics of the rock material. However, as a crucial objective function for optimizing perforating charge structures, jet velocity lacks a rapid and accurate calculating method. This article addresses this issue by proposing an improved collapse velocity model using the DP46RDX42-Y perforating charge as a case study. It presents a novel approach for calculating jet velocity based on the unsteady Pugh-Eichelberger-Rostoker (PER) theory. To validate the effectiveness of the proposed method and analyze the impact of different characteristic parameters on jet tip velocity, a series of numerical simulations were conducted using LS-DYNA software combined with Arbitrary Lagrange-Euler (ALE) techniques. Results indicate excellent agreement between the proposed method and the numerical results, demonstrating its superiority over the traditional Gurney formula with an impressive 34.15% increase in accuracy. Notably, this method is particularly suitable for perforating charges with low detonation velocity. Increasing the liner density and decreasing the liner thickness and cone angle is recommended to achieve higher jet tip velocity. Furthermore, the proposed method has the potential for broader application in other perforating charges with varying liner shapes. This study provides a comprehensive and efficient solution for calculating jet velocity, which facilitates optimizing perforating charge structures and calculating penetration depth.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 4311-4327"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentological and geochemical characteristics of lower Cambrian Qiongzhusi shale in the Sichuan Basin and its periphery, SW China: Implications for differences in organic matter enrichment","authors":"Cheng-Lin Ye ,&nbsp;Jun-Jun Shen ,&nbsp;Shan-Shan Li ,&nbsp;Yu-Man Wang ,&nbsp;Guang-Chao Tan ,&nbsp;Jia-Kai Yan ,&nbsp;Lin Zhou ,&nbsp;Ji-Yong Liu","doi":"10.1016/j.petsci.2024.07.004","DOIUrl":"10.1016/j.petsci.2024.07.004","url":null,"abstract":"<div><div>Few studies have systematically investigated the factors controlling organic matter enrichment in shales from the Qiongzhusi Formation, within and surrounding the Sichuan Basin, under different depositional environments. This has resulted in different academic understandings and limited clarity on the mechanisms of organic matter enrichment. On this premise, in this study, the basic geological characteristics and depositional paleoenvironments of shales along the passive continental margin, the western Hubei Trough, and the western Sichuan Trough were compared and analyzed using core, outcrop, and mineral testing. Furthermore, data from organic geochemical and elemental analyses were utilized to investigate the different enrichment mechanisms and formation modes of the organic matter in different periods. The results reveal that the organic matter enrichment in this region should be mainly influenced by the preservation conditions, paleo-productivity, and terrigenous input. However, there were clear differences in the main controlling factors in the different periods. In the Q1 phase, the region had a high sea level, had the strongest rifting, had the largest accommodation space, and exhibited characteristics of low terrestrial input and bottom water hypoxia. The changes in the paleo-productivity caused by upwelling currents were the main factors controlling the variations in the organic matter enrichment. In the Q2 phase, the weakened decreasing sea level co-occurred with a reduction in the accommodation space across the region. The organic matter enrichment was significantly controlled by the paleo-productivity, preservation conditions, and terrigenous inputs, and the organic matter enrichment conditions deteriorated from the passive continental margin to the western Hubei Trough and western Sichuan Trough. The total organic carbon (TOC) content of the shale decreased significantly. In the Q3 phase, the entire region entered an infilling stage, which was dominated by an oxygen-rich environment, and the preservation conditions were the decisive factor controlling the organic matter enrichment. The TOC content was low overall, and there were no evident differences across the different zones.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 3774-3789"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The mechanical properties of Lucaogou shale layered samples and the influence of minerals on fracture propagation","authors":"Xiu-Kuo Sun ,&nbsp;Shou-Ding Li ,&nbsp;Xiao Li ,&nbsp;Guan-Fang Li ,&nbsp;Bo Zheng ,&nbsp;Tian-Qiao Mao ,&nbsp;Jing-Yun Guo","doi":"10.1016/j.petsci.2024.09.007","DOIUrl":"10.1016/j.petsci.2024.09.007","url":null,"abstract":"<div><div>Shale oil is one of the most promising alternative unconventional energies in the world, and Lucaogou Formation shows significant exploration potential, becoming the primary target in northwestern China. This paper compared the mechanical properties of shale layered samples from oil layer and interlayer of Lucaogou Formation, using uniaxial compressive tests with real-time micro-CT scanning. After that, the mineral analysis was conducted on one cross-section of the fractured sample to analyze the influence of mineral composition and distribution on micro-crack propagation. Such research has rarely been reported before. The results showed the surface porosity and elastic modulus of oil-bearing samples is larger than that of the interlayer samples, while the uniaxial compressive strength is lower. Besides, when there is only one dominant mineral with a content greater than 60%, a main crack tends to form at this area; When there are 2∼3 major minerals with a content of 10%–60%, a fractured zone with many fine micro-cracks is more likely to form here. Finally, the higher the Moh's hardness of the mineral, the more difficult it is for micro-cracks to develop through it.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 3899-3908"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of mantle-derived fluids on source-related biomarkers in crude oils: A case study from the Dongying Depression, eastern China","authors":"Ting Liang ,&nbsp;Mei-Lin Jiao ,&nbsp;Xin-Liang Ma ,&nbsp;Liu-Ping Zhang","doi":"10.1016/j.petsci.2024.06.002","DOIUrl":"10.1016/j.petsci.2024.06.002","url":null,"abstract":"<div><div>Mantle-derived fluids can change the biomarker compositions in oil, with respect to abnormal thermal energy and volatiles input. Identification the reliable biomarkers for oil-source correlation is important in the regions that have been affected by mantle-derived fluids. In the Dongying Depression, deep faults, including Gaoqing-Pingnan Fault in the western part and the Shicun Fault in the southern part, have provided the avenues by which large volumes of mantle-derived fluids have entered this petroliferous depression. For the purpose of comparison, oil and accompanied gas were collected from the active zones with mantle-derived fluids activities, and the stable zones with little mantle-derived fluids. According to isotopic analyses (i.e., helium isotope, δ¹³C_CO2 and δ²H_CH4), mantle-derived fluids in the north part of the Dongying Depression have more H₂ and less CO₂ than those in the south part. The correlations between source-related biomarkers in crude oils and isotopic compositions in the corresponding gases suggest that many biomarker parameters have lost their original signatures due to the abnormal thermal energy, and H₂ and/or CO₂ derived from the mantle-derived fluids. Pr/Ph, for example, can be modified by both thermal energy and H₂ from the mantle-derived fluids. Systematic increase or decrease in the gammacerane index, C₂₄ tetracyclic/C₂₆ tricylic terpane and C₂₁/C₂₃ tricylic terpane may be indicative of the occurrence of abnormal thermal energy. C₃₁/C₃₀ hopane, DBT/TF and DBF/TF, in contrast, may indicate the contribution of hydrogenation as opposed to that of CO₂ supply. The relative distributions of C₂₇, C₂₈ and C₂₉ ααα (20R) steranes are probably altered little by the mantle-derived fluids. Based on the ternary diagram of C₂₇, C₂₈ and C₂₉ steranes, the oil samples collected from the Dongying Depression were largely the mixtures derived from source rocks in lower layer of the Es₃ member and upper layer of the Es₄ member.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 3706-3719"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141404857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas prediction in tight sandstones based on the rock-physics-derived seismic amplitude variation versus offset method","authors":"Han Jin,&nbsp;Cai Liu,&nbsp;Zhi-Qi Guo","doi":"10.1016/j.petsci.2024.06.006","DOIUrl":"10.1016/j.petsci.2024.06.006","url":null,"abstract":"<div><div>Estimating gas enrichments is a key objective in exploring sweet spots within tight sandstone gas reservoirs. However, the low sensitivity of elastic parameters to gas saturations in such formations makes it a significant challenge to reliably estimate gas enrichments using seismic methods. Through rock physical modeling and reservoir parameter analyses conducted in this study, a more suitable indicator for estimating gas enrichment, termed the gas content indicator, has been proposed. This indicator is formulated based on effective fluid bulk modulus and shear modulus and demonstrates a clear positive correlation with gas content in tight sandstones. Moreover, a new seismic amplitude variation versus offset (AVO) equation is derived to directly extract reservoir properties, such as the gas content indicator and porosity, from prestack seismic data. The accuracy of this proposed AVO equation is validated through comparison with the exact solutions provided by the Zoeppritz equation. To ensure reliable estimations of reservoir properties from partial angle-stacked seismic data, the proposed AVO equation is reformulated within the elastic impedance inversion framework. The estimated gas content indicator and porosity exhibit favorable agreement with logging data, suggesting that the obtained results are suitable for reliable predictions of tight sandstones with high gas enrichments. Furthermore, the proposed methods have the potential to stimulate the advancement of other suitable inversion techniques for directly estimating reservoir properties from seismic data across various petroleum resources.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 3951-3964"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141401197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production decline curve analysis of shale oil wells: A case study of Bakken, Eagle Ford and Permian","authors":"Hui-Ying Tang ,&nbsp;Ge He ,&nbsp;Ying-Ying Ni ,&nbsp;Da Huo ,&nbsp;Yu-Long Zhao ,&nbsp;Liang Xue ,&nbsp;Lie-Hui Zhang","doi":"10.1016/j.petsci.2024.07.029","DOIUrl":"10.1016/j.petsci.2024.07.029","url":null,"abstract":"<div><div>The shale revolution has turned the United States from an oil importer into an oil exporter. The success of shale oil production in the U.S. has inspired many countries, including China, to begin the exploitation and development of shale oil resources. In this study, the production curves of over 30,000 shale oil wells in the Bakken, Eagle Ford (EF) and Permian are systematically analyzed to provide reference and guidance for future shale oil development. To find out the most suitable decline curve models for shale oil wells, fifteen models and a new fitting method are tested on wells with production history over 6 years. Interestingly, all basins show similar results despite of their varieties in geological conditions: stretched exponential production decline (SEPD) + Arps model provides most accurate prediction of estimated ultimate recovery (EUR) for wells with over 2 years' production, while the Arps model can be used before the two years’ switch point. With the EUR calculated by decline curve analysis, we further construct simple regression models for different basins to predict the EUR quickly and early. This work helps us better understand the production of shale oil wells, as well as provide important suggestions for the choices of models for shale oil production prediction.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 4262-4277"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential application of wet-phase modified expandable graphite particles as a novel in-depth profile control agent in carbonate reservoirs","authors":"Bo-Zhao Xu ,&nbsp;Dong-Fang Lv ,&nbsp;Dai-Yu Zhou ,&nbsp;Ning Sun ,&nbsp;Si-Yu Lu ,&nbsp;Cai-Li Dai ,&nbsp;Guang Zhao ,&nbsp;Ming-Ming Shi","doi":"10.1016/j.petsci.2024.07.008","DOIUrl":"10.1016/j.petsci.2024.07.008","url":null,"abstract":"<div><div>Novel wet-phase modified expandable graphite (WMEG) particles were developed for in-depth profile control in carbonate reservoirs. The harsh environment of carbonate reservoirs (≥ 130 °C, ≥ 22 × 10⁴ mg/L) brings significant challenges for existing profile control agents. WMEG particles were developed to address this problem. WMEG particles were synthesized via intercalation with ultrasound irradiation and chemical oxidation. The critical expansion temperature of WMEG particles is 130 °C, and these particles can effectively expand 3–8 times under high temperature and high salinity water. The core flow experiments show that WMEG particles exhibit a good plugging capacity, profile control capacity, and a better-enhanced oil recovery (EOR) capacity in deep carbonate reservoirs. WMEG particles can be expanded in the formation and form larger particles that bridge the upper and lower end faces of the fracture. Then the high-permeability zones are effectively plugged, and the heterogeneity is improved, resulting in an obvious increase in oil recovery. This research provides a novel insight into future applications of profile control agents for in-depth profile control treatment in carbonate reservoirs.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 4153-4164"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141701888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Architectural characterization of carbonate tidal channels in the Mishrif formation, Southeastern Iraq","authors":"Zhan-Feng Qiao ,&nbsp;Guang-Ya Zhu ,&nbsp;Shun-Li Li ,&nbsp;Guan-Ming Shao ,&nbsp;Wen-Jun Kang ,&nbsp;Xiao-Wei Sun ,&nbsp;Qian-Ying Yao ,&nbsp;Yu Zhang","doi":"10.1016/j.petsci.2024.07.013","DOIUrl":"10.1016/j.petsci.2024.07.013","url":null,"abstract":"<div><div>For a better understanding of the strong heterogeneities of the Mishrif Formation in the H Oilfield of southeast Iraq, the characterization of the carbonate architectures has become one of the key research departments of carbonate rocks. This study aims to reveal the architecture and controlling factors of the carbonate tidal channels in the MB1-2B sub-layer of the Mishrif Formation in response to the delineation of the tidal channels that have hydrocarbon potential. Three architectural elements and three architectural boundaries of the tidal channels were identified by interpreting the cores, well-logging, seismic, and analytical data. The results show that: (1) the architecture characteristics of tidal channels are mainly migrating type in the downstream zone, the side of concave bank of the tidal channels is usually filled with relatively coarse-grained grainstone; (2) the architecture characteristics of tidal channels are mainly swinging type in the upstream zone, showing the high porosity and permeability; (3) the architecture characteristics of tidal channels are mainly vertical-accretion type in the mid-regions, indicating the instantaneous current reversals and high geographical position. This analysis demonstrates that the best reservoir quality within the tidal channels is located in the bend of the tidal channel near the inner lagoon and open sea, it provides the geological models for later exploration and development in the Mishrif Formation.</div></div>","PeriodicalId":19938,"journal":{"name":"Petroleum Science","volume":"21 6","pages":"Pages 3790-3803"},"PeriodicalIF":6.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}