Interpretation最新文献_第4页

Fault structure and hydrocarbon prospects of the Palawan basin on the southeastern margin of the South China Sea based on gravity, magnetic, and seismic data 基于重力、磁力和地震数据的南海东南缘巴拉望盆地断层结构和油气前景

Interpretation Pub Date : 2024-03-25 DOI: 10.1190/int-2022-0125.1

Chunguan Zhang, Shixiang Liu, Bingqiang Yuan, Gongcheng Zhang

{"title":"Fault structure and hydrocarbon prospects of the Palawan basin on the southeastern margin of the South China Sea based on gravity, magnetic, and seismic data","authors":"Chunguan Zhang, Shixiang Liu, Bingqiang Yuan, Gongcheng Zhang","doi":"10.1190/int-2022-0125.1","DOIUrl":"https://doi.org/10.1190/int-2022-0125.1","url":null,"abstract":"In order to study the structural features and hydrocarbon prospects of the Palawan basin in the South China Sea (SCS), the authors collected and collated the existing gravity and magnetic data, and obtained edge recognition information from potential. Combined with the seismic profile data, this paper analyzed the features of the gravity and magnetic anomalies and the edge recognition information of the potential fields, determined the fault system, and delineated favorable areas for oil and gas exploration in the Palawan basin. The results showed that four main groups of faults with NE, NW, near EW, and near SN trends developed in the Palawan basin and adjacent areas in the SCS. The NE-trending fault was the regional fault, while the NW-trending fault was the main fault. The NW-trending fault often terminated at the NE-trending fault, indicating that the NW-trending fault was formed later. This investigation has characterized two different types (Type I and Type II) of exploration favorable areas based on characteristics observed. The most notable characteristic of these exploration favorable areas was that they were located in the high value zones of the local anomaly of Bouguer gravity anomaly, and their development was obviously controlled by the faults. The amplitude of gravity anomalies was higher and the gradient of the gravity anomalies was steeper, and there were oil and gas wells and fields distributed in Type I favorable areas for exploration. Compared with Type I favorable areas, the amplitude of gravity anomalies was relatively small and the gradient of the gravity anomalies was relatively gentle corresponding to Type II favorable areas.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":" 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Normal Fault Reactivation Induced by Hydraulic Fracturing: Poroelastic Effects 水力压裂引发的正常断层再活化：挤塑效应

Interpretation Pub Date : 2024-03-25 DOI: 10.1190/int-2023-0031.1

Mahdi Haddad, P. Eichhubl

{"title":"Normal Fault Reactivation Induced by Hydraulic Fracturing: Poroelastic Effects","authors":"Mahdi Haddad, P. Eichhubl","doi":"10.1190/int-2023-0031.1","DOIUrl":"https://doi.org/10.1190/int-2023-0031.1","url":null,"abstract":"Numerous surface-felt earthquakes have been spatiotemporally correlated with hydraulic fracturing operations. Because large deformations occur close to hydraulic fractures (HFs), any associated fault reactivation and resulting seismicity must be evaluated within the length scale of the fracture stages and based on precise fault location relative to the simulated rock volumes. To evaluate changes in Coulomb failure stress (CFS) with injection, we conducted fully coupled poroelastic finite-element simulations using a pore-pressure cohesive zone model for the fracture and fault core in combination with a fault-fracture intersection model. The simulations quantify the dependence of CFS and fault reactivation potential on host-rock and fault properties, spacing between fault and HF, and fracturing sequence. We find that fracturing in an anisotropic in-situ stress state does not lead to fault tensile opening but rather dominant shear reactivation through a poroelastic stress disturbance over the fault core ahead of the compressed central stabilized zone. In our simulations, poroelastic stress changes significantly affect fault reactivation in all simulated scenarios of fracturing 50-200 m away from an optimally oriented normal fault. Asymmetric HF growth due to the stress-shadowing effect of adjacent HFs leads to 1.) a larger reactivated fault zone following simultaneous and sequential fracturing of multiple clusters compared to single-cluster fracturing; and 2.) larger unstable area (CFSgt;0.1) over the fault core or higher potential of fault slip following sequential fracturing compared to simultaneous fracturing. The fault reactivation area is further increased for a fault with lower conductivity and with a higher opening-mode fracture toughness of the overlying layer. To reduce the risk of fault reactivation by hydraulic fracturing under reservoir characteristics of the Barnett Shale, the Fort Worth Basin, it is recommended to 1.) conduct simultaneous fracturing instead of sequential; and 2.) to maintain a minimum distance of ~ 200 m for HF operations from known faults.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":" 34","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140385032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbonate mounds formed by mud volcanism at the Cretaceous-Paleogene boundary, Saudi Arabia 沙特阿拉伯白垩纪-古近纪边界泥火山形成的碳酸盐丘

Interpretation Pub Date : 2024-03-12 DOI: 10.1190/int-2023-0114.1

Simon A. Stewart, Abdullah S. Muslem

{"title":"Carbonate mounds formed by mud volcanism at the Cretaceous-Paleogene boundary, Saudi Arabia","authors":"Simon A. Stewart, Abdullah S. Muslem","doi":"10.1190/int-2023-0114.1","DOIUrl":"https://doi.org/10.1190/int-2023-0114.1","url":null,"abstract":"More than 1,000 mound structures have been mapped in shallow marine sediments at the Cretaceous Paleogene boundary in the Rub Al-Khali of Saudi Arabia. Mapping utilized 3D reflection seismic data in a 37,000 square kilometer study area. No wells penetrate the mounds themselves. The mounds are at a present-day subsurface depth of approximately 1 km and are convex-up with diameters of 200 400 m and elevation of 10 15 m. The mounds display spatial self-organization with a mean separation of approximately 3.75 km. Comparison with mound populations in other study areas with known spatial distribution statistics and modes of origin indicates that the mound population in this study has the characteristics of fluid escape structures, and they are interpreted here as mud volcanoes. The observation that the mounds occur at the Cretaceous Paleogene boundary demands a singular trigger at that moment in time. We develop a model of seismic energy related mud volcanism mechanism including the Chicxulub asteroid impact as the energy source that accounts for the timing of the mound structures, and a drainage cell model based on producing water wells that provides a mechanism for spatial self-organization into a regular pattern.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":"82 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140250674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LITHOCODIUM MOUND IDENTIFICATION USING LWD IMAGE LOG AND QUANTIFIED CUTTING ANALYSIS VALIDATION WITH ANALOGUES 利用 LWD 图像日志和量化切削分析对石丘进行识别，并用类似物进行验证

Interpretation Pub Date : 2024-03-05 DOI: 10.1190/int-2023-0071.1

Christian Perrin, Chay Pointer, Ghada Al-Mohannadi, Shantanu Sen, M. Buraimoh

{"title":"LITHOCODIUM MOUND IDENTIFICATION USING LWD IMAGE LOG AND QUANTIFIED CUTTING ANALYSIS VALIDATION WITH ANALOGUES","authors":"Christian Perrin, Chay Pointer, Ghada Al-Mohannadi, Shantanu Sen, M. Buraimoh","doi":"10.1190/int-2023-0071.1","DOIUrl":"https://doi.org/10.1190/int-2023-0071.1","url":null,"abstract":"Lithocodium mounds are early Cretaceous sedimentary structures described in the literature from outcrops, however, never described in the subsurface. The objective of this work is to identify and characterize Lithocodium mounds in the subsurface along a 25,000 ft horizontal well. Drill cuttings sampled at a 100 ft interval are observed in thin sections to define and quantify key sedimentary indicators (bioclasts, facies, and texture). Logging-while-drilling (LWD) GR, density, neutron, and resistivity logs are acquired along with the LWD high-resolution borehole image (BHI) log. Bedding dips from BHI data, interpreted along the horizontal well, enabled the reconstruction of the reservoir paleotopography. In particular, the alternation of dip azimuth combined with the facies interpretation from the thin sections supported the interpretation of eight distinct mound structures. An assessment of their overall geometry confirmed the mound shape to be subcircular, consistent with the subcircular geometries observed in Oman at the outcrop. The inferred dimensions of the mounds are comparable with the Aptian Lithocodium mounds in Oman (30–40 m), and their intermound organization resembles that of the Albian mounds in Texas. This work demonstrates the value of analyzing cuttings to complement image log interpretation and the value of outcrop analogs for interpreting sedimentary structures. For the first time, the subsurface identification and characterization of Lithocodium mounds and intermounds are achieved.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":"124 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140078959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gas-bearing Prediction in Tight Sandstone Reservoirs Based on Multi-Network Integration 基于多网络集成的致密砂岩储层含气预测

Interpretation Pub Date : 2024-02-26 DOI: 10.1190/int-2023-0091.1

Tao Xiang, Junxing Cao, Lingsen Zhao, Hong Li, Yuanhao Ren, Pengfei Jian

引用次数: 0

Integration of deep learning fault segmentation, HTI analysis, and ambient microseismic methods to enhance fracture prediction in the Crisol Anticline, Colombia 整合深度学习断层划分、高温热成像分析和环境微地震方法，加强哥伦比亚克里斯奥尔起伏线的断裂预测

Interpretation Pub Date : 2024-02-26 DOI: 10.1190/int-2023-0046.1

Roderick Perez Altamar, Menno Wiebe, Andrea Pablos Corredor

引用次数: 0

Use of Resistivity and Density Borehole Image Logs to Identify and Distribute Facies in the Pikka Unit - A Case Study from the Nanushuk Formation, North Slope, Alaska 使用电阻率和密度井眼图像测井仪识别和分布皮卡单元中的岩层--阿拉斯加北坡纳努舒克地层案例研究

Interpretation Pub Date : 2024-02-23 DOI: 10.1190/int-2023-0072.1

Ricardo Perona, Dominic Armitage, James Bonelli, Nicola Capuzzo, Brady Tingey

{"title":"Use of Resistivity and Density Borehole Image Logs to Identify and Distribute Facies in the Pikka Unit - A Case Study from the Nanushuk Formation, North Slope, Alaska","authors":"Ricardo Perona, Dominic Armitage, James Bonelli, Nicola Capuzzo, Brady Tingey","doi":"10.1190/int-2023-0072.1","DOIUrl":"https://doi.org/10.1190/int-2023-0072.1","url":null,"abstract":"Over the past decade, the North Slope of Alaska has yielded several major hydrocarbon discoveries in deltaic topsets of the Brookian Nanushuk Formation. Together the Nanushuk topsets and genetically related foreset and bottomset beds of the Torok Formation comprise part of a giant clinothem system that prograded across the Colville Foreland Basin during the lower Cretaceous (Aptian through Cenomanian). The discovered Nanushuk topset play contains stratigraphically trapped hydrocarbons within multiple fairways trending roughly north to south along the basins extent. The Nanushuk topset play was first discovered in the Pikka Unit by Repsol and partners during the 2013 winter drilling campaign. The Pikka Unit is located at the eastern edge of the Nanushuk-Torok clinothem system and underlies the modern-day Colville River. Here, the Nanushuk Formation comprises shelf-edge deltaic and shoreface deposits, characterized by intercalations of fine-grained litharenites and silty mudstones. The layered character of the formation is readily recognized in electric logs due to density and resistivity contrasts between those main lithologies. Following the initial Pikka discovery, 14 appraisal wells were drilled in the unit, including 2 horizontal and 2 high angle wells. An extensive and diverse borehole image dataset was acquired and includes wireline high resolution oil-based mud resistivity and logging-while-drilling azimuthal density images. In addition, more than 1000 feet of continuous core was collected in three wells (Qugruk-8, Pikka B, Pikka B ST1). Borehole images were then used to orientate the high resolution CT scan images of the cores, which afterwards were integrated with the image log analysis. This study presents a case on how the integration of core sedimentology and detailed borehole image log analysis were used to guide and predict the facies distribution across the Pikka unit.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":"27 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140435303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

S-WAVE SEISMIC DATA INTERPRETATION FOR GAS RESERVOIR AT SANHU AREA, QAIDAM BASIN, WEST CHINA 中国西部柴达木盆地三湖地区气藏 S 波地震数据解释

Interpretation Pub Date : 2024-02-21 DOI: 10.1190/int-2023-0059.1

Zhiwen Deng, Rui Zhang, Yan Wang, Yuanyuan Yue, Xiaoyu Xi, Xiusong Wang, Jie Wang

{"title":"S-WAVE SEISMIC DATA INTERPRETATION FOR GAS RESERVOIR AT SANHU AREA, QAIDAM BASIN, WEST CHINA","authors":"Zhiwen Deng, Rui Zhang, Yan Wang, Yuanyuan Yue, Xiaoyu Xi, Xiusong Wang, Jie Wang","doi":"10.1190/int-2023-0059.1","DOIUrl":"https://doi.org/10.1190/int-2023-0059.1","url":null,"abstract":"The Qigequan Formation at the Sanhu area of the Qaidam Basin in western China is a significant gas production formation. However, the conventional P-wave seismic survey conducted in this region reveals the presence of extensive gas clouds that strongly attenuate P-waves, resulting in substantial uncertainty regarding the subsurface structure. To address this challenge, we undertook a 3D9C (three-dimensional nine-component) seismic survey, producing direct S-wave data unaffected by gas clouds, yielding remarkably clearer subsurface images with a higher level of confidence. The processing of the S-wave data largely utilized conventional P-wave processing techniques, except for shear wave splitting, which produced distinct Fast (S1) and Slow (S2) S-wave datasets. Notably, the S2 data exhibited superior quality compared to the S1 data, enabling us to apply various seismic attributes and inversion techniques to extract geological features. To validate our findings, we cross-referenced the seismic attributes and inversion results with well-log and production data, revealing a pronounced spatial correlation between the gas reservoir and channel structure. Consequently, we have identified channel structures as the prime targets for potential gas reservoirs.#xD;","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":"16 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Lookback Study of Well Performance Using Borehole Image Data 利用井眼图像数据对油井性能进行回溯研究

Interpretation Pub Date : 2024-02-21 DOI: 10.1190/int-2023-0089.1

Haiqing Wu, Gulmira Kuanyshova, E. Iskakov, Ahmad Aruri

引用次数: 0

ASSESSMENT OF BOREHOLE BREAKOUTS FROM ACOUSTIC IMAGE LOG AND ITS GEOMECHANICAL IMPLICATIONS A CASE STUDY FROM TRIASSIC-ORDOVICIAN INTERVAL OF BERKAOUI FIELD, SOUTHEASTERN ALGERIA 从声学图像测井仪评估井眼破裂及其对地质力学的影响--阿尔及利亚东南部 Berkaoui 油田三叠系-始新统层间的案例研究

Interpretation Pub Date : 2024-02-16 DOI: 10.1190/int-2023-0101.1

R. Baouche, Souvik Sen

{"title":"ASSESSMENT OF BOREHOLE BREAKOUTS FROM ACOUSTIC IMAGE LOG AND ITS GEOMECHANICAL IMPLICATIONS A CASE STUDY FROM TRIASSIC-ORDOVICIAN INTERVAL OF BERKAOUI FIELD, SOUTHEASTERN ALGERIA","authors":"R. Baouche, Souvik Sen","doi":"10.1190/int-2023-0101.1","DOIUrl":"https://doi.org/10.1190/int-2023-0101.1","url":null,"abstract":"In this study, we interpreted a cumulative 600m acoustic image log across the Triassic to Cambro-Ordovician interval in the Berkaoui oil field, Algeria. We interpreted 40 distinct breakout zones which have a combined length of 210m. These breakouts are aligned in the NNE-SSW direction indicating a mean maximum horizontal stress (SHmax) azimuth of 110°N. The observed breakouts are ranked as A-Quality following the World Stress Map ranking guidelines. The angular width of each breakout has been inferred from the image log analysis and the same has been utilized to infer the SHmax gradient by stress polygon approach following the frictional faulting mechanism. The stress polygon across all the breakout intervals provides a practical Shmax range between 24.7-31.1 MPa/km, with an average gradient of ~ 27 MPa/km. Considering the Shmin range across the studied intervals, we infer a SHmax/Shmin ratio dominantly between 1.40-1.65, which is a much narrower and better-constrained range when compared to the previously published ranges from nearby fields with the same stratigraphy. The relative magnitudes of the in-situ stresses indicate a strike-slip faulting regime in the Berkaoui field. This study presents the utility of image log analysis and integration of breakout interpretation to obtain a more robust geomechanical model with reduced SHmax uncertainty.","PeriodicalId":502519,"journal":{"name":"Interpretation","volume":"15 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139960965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0