长宁国家级页岩气示范区地质工程一体化最优化关键要素实践与认识
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摘要
长宁国家级页岩气示范区的建设和上产历程,从早期以工程探索和实践为主,到第三阶段依托主体技术、全面推进地质工程一体化,在中国页岩气开发探索中具有很强的代表性。围绕"单井提产、整体增效"的核心要求,需要充分运用各种地质工程数据,系统性地研究水平井箱体、压裂改造、生产制度和开发技术政策这四大最优化关键要素,不断提升从单井到全气田的产量、最终可采储量(EUR)和经济指标。基于地质工程一体化研究形成的三维共享地学模型,运用多学科多参数数据分析、应力敏感页岩多场耦合模拟(包括地质力学、水力压裂缝网建模和气藏数值模拟),以及全气田数值模拟等技术和方法,系统分析和评价工程实施效果,通过在目前主体技术条件下的多方案对比,确定了最优化箱体位置和优化的生产制度,明确了压裂参数及工艺、井距参数及布井的进一步优化方向。为了实现整体优化,提出地质工程一体化需从以单井为主的钻井、完井压裂和生产工程,拓展到全气田开发工程。为此,在国内外首次开展了考虑应力敏感性的页岩气全气田数值模拟研究。
The Changning National Shale Gas Demonstration Zone is a representative case in China's shale gas industry. Its development has transited from the engineering exploration and practice initially to the comprehensive geoengineering integration in the third stage. For purpose of "single-well production increase and overall efficiency improvement", it is necessary to make full use of various geological and engineering data to systematically study four optimal key elements: horizontal well box, fracturing stimulation, production system and development technology, aiming to continuously increasing production from single well to full gas field, and improving the estimated ultimate recovery(EUR)and economic indicators. A 3D shared geoscience model based on geoengineering integration can perform system analysis and evaluation of project implementation effects by multidisciplinary and multi-parameter data analysis, multi-field coupled simulation on stress-sensitive shale(including geomechanics, modeling hydraulic fracture network and gas reservoir numerical simulation) and full gas field numerical simulation.By comparing multiple programs under current technical conditions, optimal box position and production system have been defined. Also,fracturing parameters and process, well location and spacing have been established. In order to achieve overall optimization, it is proposed that geoengineering integration should transform from well-based integration of drilling, completion fracturing and production to full gas fieldbased development project. As a response, numerical simulation to stress-sensitive shale was carried out on full gas field for the first time at home and abroad.
The Changning National Shale Gas Demonstration Zone is a representative case in China's shale gas industry. Its development has transited from the engineering exploration and practice initially to the comprehensive geoengineering integration in the third stage. For purpose of "single-well production increase and overall efficiency improvement", it is necessary to make full use of various geological and engineering data to systematically study four optimal key elements: horizontal well box, fracturing stimulation, production system and development technology, aiming to continuously increasing production from single well to full gas field, and improving the estimated ultimate recovery(EUR)and economic indicators. A 3D shared geoscience model based on geoengineering integration can perform system analysis and evaluation of project implementation effects by multidisciplinary and multi-parameter data analysis, multi-field coupled simulation on stress-sensitive shale(including geomechanics, modeling hydraulic fracture network and gas reservoir numerical simulation) and full gas field numerical simulation.By comparing multiple programs under current technical conditions, optimal box position and production system have been defined. Also,fracturing parameters and process, well location and spacing have been established. In order to achieve overall optimization, it is proposed that geoengineering integration should transform from well-based integration of drilling, completion fracturing and production to full gas fieldbased development project. As a response, numerical simulation to stress-sensitive shale was carried out on full gas field for the first time at home and abroad.
引文
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[15]姜宇玲,关富佳,胡海燕.川东龙马溪组页岩应力敏感实验研究[J].西安石油大学学报:自然科学版,2016,31(6):80-86.Jiang Yuling,Guan Fujia,Hu Haiyan.Experimental study on stress sensitivity of Longmaxi Formation shale in eastern Sichuan[J].Journal of Xi’an Shiyou University:Natural Science Edition,2016,31(6):80-86.
[16]Vera F,Economides C E.Diagnosing pressure-dependentpermeability in long-term shale gas pressure and production transient analysis[C].SPE-166152-MS,SPE Annual Technical Conference and Exhibition,New Orleans,Louisiana,USA,30September2 October 2013.
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[18]Matteo M P,Lee D,Shan D,Morales A.Advanced modeling of interwell-fracturing interference:an Eagle Ford shale-oil study[J].SPE-174902-PA,SPE Journal,2016,21(5):1567-1582.
[19]Gakhbar K,Rodionov Y,Defeu C,Shan D,Malpani R,Ejofodomi E,et al.Engineering and effective completion and stimulation strategy for in-fill wells[C].SPE-184835-MS,SPEHydraulic Fracturing Technology Conference and Exhibition,The Woodlands,Texas,USA,24-26 January 2017.
[20]Jacobs T.Oil and gas producers find frac hits in shale wells a major challenge[J].SPE-0417-0029-JPT,Journal of Petroleum Technology,2017,69(4):29-34.
[21]Pitakbunkate T,Balbuena P B,Moridis G J,Blasingame T A.Effect of confinement on pressure/volume/temperature properties of hydrocarbons in shale reservoirs[J].SPE-170685-PA,SPEJournal,2016,21(2):621-634.
[2]胡文瑞.地质工程一体化是实现复杂油气藏效益勘探开发的必由之路[J].中国石油勘探,2017,22(1):1-5.Hu Wenrui.Geology-engineering integration-a necessary way to realize profitable exploration and development of complex reservoirs[J].China Petroleum Exploration,2017,22(1):1-5.
[3]谢军,张浩淼,佘朝毅,李其荣,范宇,杨扬.地质工程一体化在长宁国家级页岩气示范区中的实践[J].中国石油勘探,2017,22(1):21-28.Xie Jun,Zhang Haomiao,She Chaoyi,Li Qirong,Fan Yu,Yang Yang.Practice of geology-engineering integration in Changning State Shale Gas Demonstration Area[J].China Petroleum Exploration,2017,22(1):21-28.
[4]谢军.长宁-威远国家级页岩气示范区建设实践与成效[J].天然气工业,2018,38(2):1-7.Xie Jun.Practices and achievements of the Changning-Weiyuan shale gas national demonstration project construction[J].Natural Gas Industry,2018,38(2):1-7.
[5]赵贤正,赵平起,李东平,武玺,汪文昌,唐世忠.地质工程一体化在大港油田勘探开发中探索与实践[J].中国石油勘探,2018,23(2):6-14.Zhao Xianzheng,Zhao Pingqi,Li Dongping,Wu Xi,Wang Wenchang,Tang Shizhong.Research and practice of geologyengineering integration in the exploration and development of Dagang oilfield[J].China Petroleum Exploration,2018,23(2):6-14.
[6]杜洪凌,许江文,李峋,陆军,章敬,彭永灿,等.新疆油田致密砂砾岩油藏效益开发的发展与深化——地质工程一体化在玛湖地区的实践与思考[J].中国石油勘探,2018,23(2):15-26.Du Hongling,Xu Jiangwen,Li Xun,Lu Jun,Zhang Jing,Peng Yongcan,et al.Development and deepening of profitable development of tight glutenite oil reservoirs in Xinjiang oilfield:application of geology-engineering integration in Mahu area and its enlightenment[J].China Petroleum Exploration,2018,23(2):15-26.
[7]杨海军,张辉,尹国庆,韩兴杰.基于地质力学的地质工程一体化助推缝洞型碳酸盐岩高效勘探——以塔里木盆地塔北隆起南缘跃满西区块为例[J].中国石油勘探,2018,23(2):27-36.Yang Haijun,Zhang Hui,Yin Guoqing,Han Xingjie.Geomechanics-based geology-engineering integration boosting high-efficiency exploration of fractured-vuggy carbonate reservoirs-a case study on West Yueman block,northern Tarim Basin[J].China Petroleum Exploration,2018,23(2):27-36.
[8]许建国,赵晨旭,宣高亮,何定凯.地质工程一体化新内涵在低渗透油田的实践——以新立油田为例[J].中国石油勘探,2018,23(2):37-42.Xu Jianguo,Zhao Chenxu,Xuan Gaoliang,He Dingkai.Application of the new connotation of geology-engineering integration in low permeability oilfields:a case study on Xinli oilfield[J].China Petroleum Exploration,2018,23(2):37-42.
[9]刘乃震,王国勇,熊小林.地质工程一体化技术在威远页岩气高效开发中的实践与展望[J].中国石油勘探,2018,23(2):59-68.Liu Naizhen,Wang Guoyong,Xiong Xiaolin.Practice and prospect of geology-engineering integration technology in the efficient development of shale gas in Weiyuan block[J].China Petroleum Exploration,2018,23(2):59-68.
[10]Weng X,Kresse O,Cohen C,Gu H.Modeling of hydraulic fracture network propagation in a naturally fractured formation[J].SPE-140253-PA,SPE Production&Operations,2011,26(4):368-380.
[11]Cohen C,Abad C,Weng X,England K,Phatak A,Kresse O,et al.Analysis on the impact of fracturing treatment design and reservoir properties on production from shale gas reservoirs[C].IPTC 16400,International Petroleum Technology Conference,Beijing,China,26-28 March 2013.
[12]Wang F P,Hammes U,Li Q H.Overview of Haynesville Shale properties and production[C].Geology of the Haynesville Gas Shale in East Texas and West Louisiana,U.S.A.:AAPGMemoir 105,2013:155-177.
[13]Thompson J W,Fan L,Grant D,Martin R B,Kanneganti KT,Lindsay G J.An overview of horizontal-well completion in the Haynesville Shale[J].Journal of Canadian Petroleum Technology,2011,50(6):22-35.
[14]Eburi S,Jones S,Houston T,Bonelli J.Analysis and interpretation of Haynesville shale subsurface properties,completion variables,and production performance using ordination,a multivariate statistical analysis technique[C].SPE-170834-MS,SPE Annual Technical Conference and Exhibition,Amsterdam,The Netherlands,27-29 October 2014.
[15]姜宇玲,关富佳,胡海燕.川东龙马溪组页岩应力敏感实验研究[J].西安石油大学学报:自然科学版,2016,31(6):80-86.Jiang Yuling,Guan Fujia,Hu Haiyan.Experimental study on stress sensitivity of Longmaxi Formation shale in eastern Sichuan[J].Journal of Xi’an Shiyou University:Natural Science Edition,2016,31(6):80-86.
[16]Vera F,Economides C E.Diagnosing pressure-dependentpermeability in long-term shale gas pressure and production transient analysis[C].SPE-166152-MS,SPE Annual Technical Conference and Exhibition,New Orleans,Louisiana,USA,30September2 October 2013.
[17]Tariq A A,Sheng J.Evaluation of the effect of stressdependent permeability on production performance in shale gas reservoirs[C].SPE-177299-MS,SPE Eastern Regional Meeting,Morgantown,West Virginia,USA,13-15 October 2015.
[18]Matteo M P,Lee D,Shan D,Morales A.Advanced modeling of interwell-fracturing interference:an Eagle Ford shale-oil study[J].SPE-174902-PA,SPE Journal,2016,21(5):1567-1582.
[19]Gakhbar K,Rodionov Y,Defeu C,Shan D,Malpani R,Ejofodomi E,et al.Engineering and effective completion and stimulation strategy for in-fill wells[C].SPE-184835-MS,SPEHydraulic Fracturing Technology Conference and Exhibition,The Woodlands,Texas,USA,24-26 January 2017.
[20]Jacobs T.Oil and gas producers find frac hits in shale wells a major challenge[J].SPE-0417-0029-JPT,Journal of Petroleum Technology,2017,69(4):29-34.
[21]Pitakbunkate T,Balbuena P B,Moridis G J,Blasingame T A.Effect of confinement on pressure/volume/temperature properties of hydrocarbons in shale reservoirs[J].SPE-170685-PA,SPEJournal,2016,21(2):621-634.
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