The Open Petroleum Engineering Journal最新文献_第5页

Analysis on Production of Coal Bed Methane Considering the Change in Permeability of Coal Rock 考虑煤岩渗透率变化的煤层气产量分析

The Open Petroleum Engineering Journal Pub Date : 2016-12-26 DOI: 10.2174/1874834101609010289

Zhu Likai, Ji Youjun, Yan Tianhong, L. Xiaoyu

{"title":"Analysis on Production of Coal Bed Methane Considering the Change in Permeability of Coal Rock","authors":"Zhu Likai, Ji Youjun, Yan Tianhong, L. Xiaoyu","doi":"10.2174/1874834101609010289","DOIUrl":"https://doi.org/10.2174/1874834101609010289","url":null,"abstract":"Based on the mechanism of migration of the coal bed methane (CBM), and taking into account the deformation of the coal rock during the process of CBM production was also taken into account, a coupled mathematical model considering the interaction of solid and fluid for methane extraction was built. The coal gas extraction of JINcheng coal mine was taken as an example, some typical coal sample was chosen to test the permeability under different confining pressure. The curve for permeability of coal rock versus effective stress under different confining pressure was obtained, a numerical model considering the variation of permeability for methane extraction was set up. The influence of deformation of coal rock on the gas production was simulated and analyzed. The simulation results indicate that the productivity curve considering deformation of rock is closer to the actual production data, at the initial stage of production, the gas rate is less than the case without considering deformation of rock, but the time of stable yield will last longer, and this matches the actual methane extraction, therefore, we recommend that the deformation of coal seam should be considered during the prediction of methane production for JINcheng coal mine.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131384450","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: 6

Retraction Notice: Study on Inversion of Mining Subsidence Based on PSO-BP Algorithm forOkada Model 基于PSO-BP算法的okada模型开采沉陷反演研究

The Open Petroleum Engineering Journal Pub Date : 2016-12-16 DOI: 10.2174/1874834101609010288

Wu Jifeng, Y. Zhiqiang, Wu Xiaolong

引用次数: 0

Analysis on the Operation Fatigue of Deepwater Drilling Riser System 深水钻井隔水管系统作业疲劳分析

The Open Petroleum Engineering Journal Pub Date : 2016-12-14 DOI: 10.2174/1874834101609010279

Liu Xiuquan, C. Guoming, Fu Jingjie, Jiang Jingqi, Song Qiang, Chang Yuanjiang

{"title":"Analysis on the Operation Fatigue of Deepwater Drilling Riser System","authors":"Liu Xiuquan, C. Guoming, Fu Jingjie, Jiang Jingqi, Song Qiang, Chang Yuanjiang","doi":"10.2174/1874834101609010279","DOIUrl":"https://doi.org/10.2174/1874834101609010279","url":null,"abstract":"Abstract: Fatigue is one of main failure modes of deepwater drilling riser system. Analysis models of wave induced fatigue and vortex induced fatigue of deepwater drilling riser are established according to the riser connection, installation and hang-off operations. Characteristics of wave induced fatigue and vortex induced fatigue of riser system in different operation modes are studied. The influence of each operation fatigue on the combined fatigue is also identified. The results show that wave induced fatigue damage and vortex induced fatigue damage of upper riser are large in installation and hard hang-off modes. The fatigue damage of riser system in soft hang-off mode is less than that in hard hang-off mode. The combined fatigue damage of the upper and lower riser is large. The lower riser is under the influence of wave induced fatigue and vortex induced fatigue, while the upper riser is mainly under the influence of wave induced fatigue, especially that in installation and hang-off modes. The fatigue damages of riser in installation and hang-off modes have a great influence on the combined fatigue of riser and cannot be neglected in riser fatigue analysis.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122609993","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: 4

Variations of Micropores in Oil Reservoir Before and After Strong Alkaline Alkaline-surfactant-polymer Flooding 强碱性-表面活性剂-聚合物驱前后油藏微孔的变化

The Open Petroleum Engineering Journal Pub Date : 2016-11-30 DOI: 10.2174/1874834101609010257

Yong-qiang Bai, Yang Chunmei, L. Mei, Jiang Zhenxue

{"title":"Variations of Micropores in Oil Reservoir Before and After Strong Alkaline Alkaline-surfactant-polymer Flooding","authors":"Yong-qiang Bai, Yang Chunmei, L. Mei, Jiang Zhenxue","doi":"10.2174/1874834101609010257","DOIUrl":"https://doi.org/10.2174/1874834101609010257","url":null,"abstract":"Enhanced oil recovery (EOR) provides a significant contribution for increasing output of crude oil. Alkaline-surfactantpolymer (ASP), as an effective chemical method of EOR, has played an important role in advancing crude oil output of the Daqing oilfield, China. Chemical flooding utilized in the process of ASP EOR has produced concerned damage to the reservoir, especially from the strong alkali of ASP, and variations of micropore structure of sandstones in the oil reservoirs restrain output of crude oil in the late stages of oilfield development. Laboratory flooding experiments were conducted to study sandstones’ micropore structure behavior at varying ASP flooding stages. Qualitative and quantitative analysis by cast thin section, scanning electric microscopy (SEM), atomic force microscopy (AFM) and electron probe X-Ray microanalysis (EPMA) explain the mechanisms of sandstones’ micropore structure change. According to the quantitative analysis, as the ASP dose agent increases, the pore width and pore depth exhibit a tendency of decrease-increase-decrease, and the specific ASP flooding stage is found in which flooding stage is most affective from the perspective of micropore structures. With the analysis of SEM images and variations of mineral compositions of samples, the migration of intergranular particles, the corrosions of clay, feldspar and quartz, and formation of new intergranular substances contribute to the alterations of sandstone pore structure. Results of this study provide significant guidance for further application to ASP flooding.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126137286","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

Production Forecasting of Coalbed Methane Wells Based on Type-2 Fuzzy Logic System 基于二类模糊逻辑系统的煤层气井产量预测

The Open Petroleum Engineering Journal Pub Date : 2016-11-30 DOI: 10.2174/1874834101609010268

Lei Xu, Kai Zhu, Xiaoli Yang

{"title":"Production Forecasting of Coalbed Methane Wells Based on Type-2 Fuzzy Logic System","authors":"Lei Xu, Kai Zhu, Xiaoli Yang","doi":"10.2174/1874834101609010268","DOIUrl":"https://doi.org/10.2174/1874834101609010268","url":null,"abstract":"Coal bed methane (CBM) reservoir production is controlled by a large set of parameters: geology, tectonics, reservoir, completion and operation. Its simulation process is complicated, relative information is difficult to be obtained, so it is necessary to analyze accurately coal bed gas potential production capacity by adopting other mathematics methods in case of incomplete information. Regarding this problem, a new type-2 fuzzy logic system (T2FLS) method to predict CBM production capacity is proposed in this paper. Methods analyze and assess input parameters of T2FLS by integrating qualitative analysis method and quantitative assessment method (Fuzzy cluster analysis and grey correlation degree analysis). Output parameters include cumulative average gas production, peak gas rate and time to achieve a peak rate. T2FLS production forecast method is applied to CBM wells of Hancheng mine and verification results show that such prediction results are highly consistent with the variation of the CBM well production. The proposed method required less data. The comparison of this method with the existed method (ANN, T1FLS) shows that the proposed method has notable advantage in generalization, stability and consistency.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125968538","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: 4

Experimental Study of Self-aggregating Proppants: New Approaches to Proppant Flowback Control 自凝聚支撑剂的实验研究:支撑剂返排控制的新途径

The Open Petroleum Engineering Journal Pub Date : 2016-11-29 DOI: 10.2174/1874834101609010236

Lipei Fu, Guicai Zhang, J. Ge, Kaili Liao, H. Pei, Jian-Da Li

{"title":"Experimental Study of Self-aggregating Proppants: New Approaches to Proppant Flowback Control","authors":"Lipei Fu, Guicai Zhang, J. Ge, Kaili Liao, H. Pei, Jian-Da Li","doi":"10.2174/1874834101609010236","DOIUrl":"https://doi.org/10.2174/1874834101609010236","url":null,"abstract":"Due to the high rate of proppant flowback after hydraulic fracturing stimulations, surface modified quartz sand proppants with excellent proppant flowback control abilities, self-aggregating proppants, were prepared. These surface modified proppants can aggregate together spontaneously and form a proppant column in water based liquid environment. Analyses show that the strong hydrogen bonds contribute to the absorption of the surface modifier onto the proppants, and the softening effect of the water to the polymer coating prompts the connection between the proppants. Scanning electron microscope pictures show that proppant particles are stacked together tightly. The stable structure contributes to the macroscopic stability of the proppant column. The maximum sand free flow rate of the model packed with modified proppants is 2.8 times larger than that of untreated proppants by average, indicating that the self-aggregating proppants exhibit excellent proppant flowback control abilities. In addition, fines control tests show that the modified proppants can also prevent the migration of the formation fines effectively, reducing the conductivity loss caused by particle migrations. By virtue of the reaggreating property and the encapsulation action of polymer coating to the crushed fragments, the fracture conductivities are increased by 3 times even at large closure stresses. The results provide a new alternative for proppant flowback control while do little damage to the permeability of the proppant pack.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116114626","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: 3

Research of Network Fracturing Method for Coalbed Methane Reservoirs 煤层气储层网络压裂方法研究

The Open Petroleum Engineering Journal Pub Date : 2016-11-29 DOI: 10.2174/1874834101609010247

Ting Li, Jifang Wan

{"title":"Research of Network Fracturing Method for Coalbed Methane Reservoirs","authors":"Ting Li, Jifang Wan","doi":"10.2174/1874834101609010247","DOIUrl":"https://doi.org/10.2174/1874834101609010247","url":null,"abstract":"The application of conventional hydraulic fracture treatment is not ideal in coalbed methane reservoirs, which influences the industry development in China, thus, the present technique should be improved. From two aspects of net pressure and stress sensibility of permeability, it is analyzed and considered that permeability around hydraulic fractures is damaged severely, so this is the main flaw of conventional hydraulic fracturing in CBM. It is proposed to shear natural fractures by fracturing treatment, which are plentiful in coalbed methane reservoirs, and the mechanical condition to generate sheared fractures is presented, in the meanwhile, it is verified that the permeability of sheared fractures is much larger than coal matrix permeability. When the angle between natural and hydraulic fractures is small in coalbed methane reservoirs, the natural fractures will shear easily at low net pressure, so network fractures can be formed. In comparison with conventional hydraulic fracturing, this new methodology can make natural fractures shear at low net pressure to form transverse network fractures, hence, the stimulated reservoir volume is larger, and damage to coal permeability is avoided. This new technique is advantageous in both stimulated reservoir volume and permeability improvement, and it is more adaptable for coalbed methane reservoirs, thus, it has a wide application prospect and significant value.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114617504","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: 4

Study and Economic Evaluation on the Process of Calorific Value Adjustment in the LNG Receiving Terminal LNG接收站热值调节过程的研究与经济评价

The Open Petroleum Engineering Journal Pub Date : 2016-11-29 DOI: 10.2174/1874834101609010226

Shuting Wang, K. Huang, Xiaoshan Wang, Ning Liao, W. Yan, Quanbin Pei, Baoding Xia

{"title":"Study and Economic Evaluation on the Process of Calorific Value Adjustment in the LNG Receiving Terminal","authors":"Shuting Wang, K. Huang, Xiaoshan Wang, Ning Liao, W. Yan, Quanbin Pei, Baoding Xia","doi":"10.2174/1874834101609010226","DOIUrl":"https://doi.org/10.2174/1874834101609010226","url":null,"abstract":"In recent years, large quantities of LNG sources have occured in international trade, which have also presented themselves with vary compositions and contain more than 10 mol % light hydrocarbons components (such as ethane and propane).This paper takes a certain typical Chinese liquefied natural gas receiving terminal as an example. For the exchange and economic issues caused by high C2 + components in the feedstock of the above mentioned LNG terminal, an adjustion of the calorific value in products by adopting LH recovery, nitrogen gas injection and liquid nitrogen injection is advised. In order to evaluate profits in LNG receiving terminal, three kinds of processes have been simulated by using of the Aspen HYSYS to realize the consumption analysis. Further more, economic benefits of three schemes are analyzed based on energy measurements. It was shown that the after-tax net profit of the receiving terminal which adds liquid nitrogen to adjust calorific value is 6.17% higher than that which extracts C2 + components under the volume measurement system. Under the system of energy measurement, the after-tax net profit of three processes is respectively increased by 8.96%, 12.51% and 12.47% compared to the original measure modes. The results suggest that the proposed liquid nitrogen injection processes is the most effective one which injects at the exit of high-pressure efflux pump, and an economical way to adjust heat value, which has the highest net profit and the lowest consumption cost and capital cost in the current Chinese LNG industry chain and economic situation.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126681926","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: 3

Retraction Notice: Daqing Crude Oil Price Forecast Based on the ARIMA Model 撤销公告:基于ARIMA模型的大庆原油价格预测

The Open Petroleum Engineering Journal Pub Date : 2016-11-10 DOI: 10.2174/1874834101609010225

Li Quan

引用次数: 0

Deep Plugging Experiments Study in High Temperature and Salinity Heterogeneous Clastic Reservoir 高温盐非均质碎屑储层深部封堵试验研究

The Open Petroleum Engineering Journal Pub Date : 2016-10-31 DOI: 10.2174/1874834101609160216

Jiwei Wang, Kaoping Song, Qianru Li

{"title":"Deep Plugging Experiments Study in High Temperature and Salinity Heterogeneous Clastic Reservoir","authors":"Jiwei Wang, Kaoping Song, Qianru Li","doi":"10.2174/1874834101609160216","DOIUrl":"https://doi.org/10.2174/1874834101609160216","url":null,"abstract":"According to the exploration and field test results, the reservoir presents high temperature (96°C) and high salinity (77954.03 mg/L) features; therefore, it is necessary to find proper plugging agent that can be used in these reservoirs to enhance oil recovery. In this paper, three kinds of polymers are studied and high temperature resistance as well as relative parameters are tested. According to the testing results, we make a preliminary determination that concentration of polymer solution is 2500-3500mg/L. However, due to the high reservoir temperature, APP5 polymer degrades severely. In view of the polymer degradation problem in high temperature, 2.7% chromium acetate is added into the APP5 solution (Cr/APP5=1/60), and the retarder is added at the same time. The stability of this new plugging agent is then tested. The results show that, when the shearing time reaches 60s, plugging agent remains at a high level of 24600mPa•s, and the static adsorption of APP5 remains at a low level of 0.36-0.38mg/g. As a consequence, the Cr/APP5 plugging agent can meet the production requirements in reservoirs. Based on results of laboratory physical simulation experiment, plugging efficiency of this plugging agent is higher than 75%, and injected slug size of Cr/APP5 plugging agent is 0.3PV.","PeriodicalId":377053,"journal":{"name":"The Open Petroleum Engineering Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126129677","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: 1