基于储层地质知识库约束的致密砂岩气藏储量评价——以鄂尔多斯盆地苏里格气田苏14区块为例
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摘要
鄂尔多斯盆地苏里格气田属于典型的致密砂岩气藏,储层非均质性强、提交储量时样本数据有限,储量计算结果存在一定的误差。以苏里格气田14区块盒8段、山1段致密砂岩气藏为研究对象,提出以储层地质知识库为约束的储量复算思路与方法。以气田密井网区储层地质知识库为指导,对研究区有效储层进行精细描述,刻画含气边界的基础上,按照"平面分单元、纵向分小层"的思路,采用容积法对储量进行复算。此外,依据累计产气量、储量丰度及内部收益率对储量进行综合分类评价。复算结果表明,含气面积和储量丰度的减小引起复算储量减少,含气面积减小是储量减少的主要原因;稀井网砂体边界控制产生的误差、井间砂体减薄尖灭及储层的非均质变化共同引起含气面积的减小。评价结果证实区块储量物质基础落实,具备较长期稳产的资源基础。
It is a typical tight sand gas reservoir with strong heterogeneous in Sulige Gasfield,Ordos Basin.The proved reserve,which has been calculated with volumetric method,is inaccurate due to the limited data.In this paper,with strongly inhomogeneous tight sandstone gas reservoir in He8 and Shan1 member of Su 14 block in Sulige Gasfield as the study objective,we put forward the method of recalculating reserves confined by database of geological knowledge about reservoir.Based on geological knowledge database established by analyzing reservoir architecture of wells in infill drilling pilot,we described the geometry and boundary of effective reservoir sand body.According to the thought"dividing the reservoir into units horizontally and minor layers vertically",the reserves were recalculated with volumetric method.In addition,the reserves were classified and evaluated synthetically according to the cumulative output of gas well,reserves abundance and internal rate of return(IRR).The result shows that the recalculated reserves reduced due to the decrease of gas bearing area and the abundance of reserves.The decrease of gas bearing area,which was caused by the sand body thinning to cutting up,the errors due to the incomplete well pattern and the inhomogeneous of reservoir,is a main reason for reserves reduction.The recalculation and evaluation show that the material base of reserve in the study area is solid,and it can maintain stable production for a long time.
It is a typical tight sand gas reservoir with strong heterogeneous in Sulige Gasfield,Ordos Basin.The proved reserve,which has been calculated with volumetric method,is inaccurate due to the limited data.In this paper,with strongly inhomogeneous tight sandstone gas reservoir in He8 and Shan1 member of Su 14 block in Sulige Gasfield as the study objective,we put forward the method of recalculating reserves confined by database of geological knowledge about reservoir.Based on geological knowledge database established by analyzing reservoir architecture of wells in infill drilling pilot,we described the geometry and boundary of effective reservoir sand body.According to the thought"dividing the reservoir into units horizontally and minor layers vertically",the reserves were recalculated with volumetric method.In addition,the reserves were classified and evaluated synthetically according to the cumulative output of gas well,reserves abundance and internal rate of return(IRR).The result shows that the recalculated reserves reduced due to the decrease of gas bearing area and the abundance of reserves.The decrease of gas bearing area,which was caused by the sand body thinning to cutting up,the errors due to the incomplete well pattern and the inhomogeneous of reservoir,is a main reason for reserves reduction.The recalculation and evaluation show that the material base of reserve in the study area is solid,and it can maintain stable production for a long time.
引文
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[13]Hu Linnan,Zhao Jingzhou.A Discussion on the determination way to efffective thickness of tight sandstone gas poos[J].Natural Gas Geoscience,2013,24(1):69-77.[胡林楠,赵靖舟.致密砂岩气藏有效厚度确定方法及应用探讨[J].天然气地球科学,2013,24(1):69-77.]
[14]Xing Baorong.Establishment of the braided river reservoir geology bank and its application:Daqing Changyuan Oilfield Lasa piece of Pu 1as an example[J].Journal of Northeast University,2014,38(6):46-53.[邢宝荣.辫状河储层地质知识库构建方法——以大庆长垣油田喇萨区块葡一组储层为例[J].东北石油大学学报,2014,38(6):46-53.]
[15]Jia Ailing,He Dongbo,He Wenxiang,et al.Application of outcrop geologieal knowledge database to prediction of interwell resevroir in oilifeld[J].Acta Petrolei Sinica,2003,24(6):51-53.[贾爱林,何东博,何文祥,等.应用露头知识库进行油田井间储层预测[J].石油学报,2003,24(6):51-53.]
[16]Shi Shuyuan,Hu Suyun,Feng Wenjie,et al.Building geological knowledge database based on Google Earth software[J].Acta Sedimentologica Sinica,2012,30(5):869-878.[石书缘,胡素云,冯文杰,等.基于Google Earth软件建立曲流河地质知识库[J].沉积学报,2012,30(5):869-878.]
[17]Zhou Yinbang,Wu Shenghe,Yue Dali,et al.Recognizing abandoned channel with underground dense well pattern and its application in Sabei Oilfield[J].Journal of Oil and Gas Technology,2008,30(4):33-36.[周银邦,吴胜和,岳大力,等.地下密井网识别废弃河道方法在萨北油田的应用[J].石油天然气学报,2008,30(4):33-36.]
[18]Qiao Hui,Wang Zhizhang,Li Li,et al.Application of geological knowledge database of modern meandering river based on satellite image[J].Geoscience,2015,29(6):1444-1453.[乔辉,王志章,李莉,等.基于卫星影像建立曲流河地质知识库及应用[J].现代地质,2015,29(6):1444-1453.]
[19]Rudkiewicz J L,Eschard R.Geological Knowledge in the Geostatistical Modeling of Reservoir Properties[M]//Lake.L W,Carroll H B,Wesson T C.Reservoir Characterization II.New York:Academic Press,1991:686-688.
[20]Gibling M R.Width and thickness of fluvial channel bodies and valley fills in the geological record:A literature compilation and classification[J].Journal of Sedimentary Research,2006,76(5):731-770.
[21]Lorenz J C,Heinze D M,Clark J A,et al.Determination of width of meander-belt sandstone reservoirs from vertical downhole date,mesaverde group,piceance creek basin,colorada[J].AAPG Bulletin,1985,69(5):710-721.
[22]Colombera Luca,Felletti Fabrizio,Mountney Nigel-P,et al.A database approach for constraining stochastic simulations of the sedimentary heterogeneity of fluvial reservoir[J].AAPG Bulletin,2012,96(11):2143-2153.
[23]Mail A D.Architectura-element analysis:A new method of facies analysis applied to fluvial deposits[J].Earth-Science Reviews,1985,22(4):261-385.
[24]Chen Qinghua,Yang Chao,Wang Xiuling,et al.A new method for calculating oil and gas reserves based on reservoir architecture unit[J].Journal of Xi′an Shiyou University:Natural Science Edition,2008,23(2):32-34.[陈清华,杨超,王秀玲,等.基于储层构成单元的油气储量计算方法[J].西安石油大学学报:自然科学版,2008,23(2):32-34.]
[25]Zhao Wenzhi,Bi Haibing.A Discussion on the unit classification in reserve estimation[J].Oil&Gas Geology,2007,28(3):309-314.[赵文智,毕海滨.论储量评估中的单元划分[J].石油与天然气地质,2007,28(3):309-314.]
[26]Li Hongxi,Zhang Peijun,Dai Cheng,et al.Difference analysis of oil&gas reserve rule between PRMS and SEC in U.S.[J].Journal of Southwest Petroleum University:Science&Technology Edition,2016,38(5):75-80.[李洪玺,张培军,代琤,等.美国PRMS与SEC两种油气储量准则差异分析[J].西南石油大学学报:自然科学版,2016,38(5):75-80.]
[27]Ministry of Land and Resources of the People’s Republic of China.DZ/T 0217-2005Regulation of Petroleum Reserves Estimation[S].Beijing:China Standards Press,2005.[中华人民共和国国土资源部DZ/T 0217-2005石油天然气储量计算规范[S].北京:中国标准出版社,2005.]
[2]Liang Changguo.Reserves Calculation of Heterogeneous Hydrocarbon Reservoir[D].Qingdao:China University of Petroleum,2008.[梁昌国.非均质油气藏的储量计算[D].青岛:中国石油大学,2008.]
[3]Li Chen,Xia Zhaohui,Wang Ping,et al.New method for estimating the reserves of tight gas reservoir[J].Special Oil and Gas Reservoirs,2015,22(5):107-109.[李陈,夏朝辉,汪萍,等.致密气藏储、量评价新方法[J].特种油气藏,2015,22(5):107-109.]
[4]Zhang Lunyou,Zhang Xiangyang.Natural gas reserves calculation and its parameter determition[J].Natural Gas Exploration&Development,2004,27(2):20-23.[张伦友,张向阳.天然气储量计算及其参数确定方法[J].天然气勘探与开发,2004,27(2):20-23.]
[5]Zhang Jinchuan,Jin Zhijun,Zheng Junmao.Deep basin gas resource-reserve evaluation method[J].Natural Gas Industry,2001,21(4):32-35.[张金川,金之钧,郑浚茂.深盆气资源量—储量评价方法[J].天然气工业,2001,21(4):32-35.]
[6]Liu Zhanliang,Cui Mingming,Fan Aiping,et al.Calculation method discussion of tight sandstone gas reserves:A case of volumetric method in SX block[J].Natural Gas Geoscience,2014,25(12):1983-1993.[刘占良,崔明明,樊爱萍,等.致密砂岩气藏储量计算方法探讨——以容积法计算SX区块储量为例[J].天然气地球科学,2014,25(12):1983-1993.]
[7]Kang Zhiyong,Wang Yongxiang,Xie Kaining,et al.Rationality analysis of volumetric reserve estimation equations[J].Special Oil and Gas Reservoirs,2012,19(3):31-34.[康志勇,王永祥,谢开宁,等.容积法储量计算方程合理性分析[J].特种油气藏,2012,19(3):31-34.]
[8]Liu Baohe.Encyclopedia of Petroleum Exploration and Development in China(Comprehensive Volume)[M].Beijing:Petroleum Industry Press,2008:78-79.[刘宝和.中国石油勘探开发百科全书(综合卷)[M].北京:石油工业出版社,2008:78-79.]
[9]Wang Yaqing,Gao Boyu,Sun Lichun.Some problems in improving caculation precision OOIP[J].Journal of Southwest Petroleum University:Science&Technology Edition,2011,33(5):63-67.[王亚青,高博禹,孙立春.提高地质储量计算精度需注意的几个问题[J].西南石油大学学报:自然科学版,2011,33(5):63-67.]
[10]Bi Haibing,Zha Quanheng,Wang Yongzhuo.Three geological factors for improving estimation quality of original oil in place[J].Acta Petrolei Sinica,2004,25(1):25-29.[毕海滨,查全衡,王永卓.提高储量评估水平的三大地质要素[J].石油学报,2004,25(1):25-29.]
[11]Zhao Wenzhi,Bian Congsheng,Xu Zhaohui.Similarities and differences between natural gas accumulations in Sulige Gasfield in Ordos Basin and Xujiahe Gasfield in central Sichuan Basin[J].Petroleum Exploration and Development,2013,40(4):400-408.[赵文智,卞从胜,徐兆辉.苏里格气田与川中须家河组气田成藏共性与差异[J].石油勘探与开发,2013,40(4):400-408.]
[12]Yang Hua,Fu Jinhua,Liu Xinshe,et al.Formation and conditions and exploration technology of large-scale tight sandstone gas reservoir in Sulige[J].Acta Petrolei Sinica,2012,33(supplement 1):27-36.[杨华,付金华,刘新社,等.苏里格大型致密砂岩气藏形成条件及勘探技术[J].石油学报,2012,33(增刊1):27-36.]
[13]Hu Linnan,Zhao Jingzhou.A Discussion on the determination way to efffective thickness of tight sandstone gas poos[J].Natural Gas Geoscience,2013,24(1):69-77.[胡林楠,赵靖舟.致密砂岩气藏有效厚度确定方法及应用探讨[J].天然气地球科学,2013,24(1):69-77.]
[14]Xing Baorong.Establishment of the braided river reservoir geology bank and its application:Daqing Changyuan Oilfield Lasa piece of Pu 1as an example[J].Journal of Northeast University,2014,38(6):46-53.[邢宝荣.辫状河储层地质知识库构建方法——以大庆长垣油田喇萨区块葡一组储层为例[J].东北石油大学学报,2014,38(6):46-53.]
[15]Jia Ailing,He Dongbo,He Wenxiang,et al.Application of outcrop geologieal knowledge database to prediction of interwell resevroir in oilifeld[J].Acta Petrolei Sinica,2003,24(6):51-53.[贾爱林,何东博,何文祥,等.应用露头知识库进行油田井间储层预测[J].石油学报,2003,24(6):51-53.]
[16]Shi Shuyuan,Hu Suyun,Feng Wenjie,et al.Building geological knowledge database based on Google Earth software[J].Acta Sedimentologica Sinica,2012,30(5):869-878.[石书缘,胡素云,冯文杰,等.基于Google Earth软件建立曲流河地质知识库[J].沉积学报,2012,30(5):869-878.]
[17]Zhou Yinbang,Wu Shenghe,Yue Dali,et al.Recognizing abandoned channel with underground dense well pattern and its application in Sabei Oilfield[J].Journal of Oil and Gas Technology,2008,30(4):33-36.[周银邦,吴胜和,岳大力,等.地下密井网识别废弃河道方法在萨北油田的应用[J].石油天然气学报,2008,30(4):33-36.]
[18]Qiao Hui,Wang Zhizhang,Li Li,et al.Application of geological knowledge database of modern meandering river based on satellite image[J].Geoscience,2015,29(6):1444-1453.[乔辉,王志章,李莉,等.基于卫星影像建立曲流河地质知识库及应用[J].现代地质,2015,29(6):1444-1453.]
[19]Rudkiewicz J L,Eschard R.Geological Knowledge in the Geostatistical Modeling of Reservoir Properties[M]//Lake.L W,Carroll H B,Wesson T C.Reservoir Characterization II.New York:Academic Press,1991:686-688.
[20]Gibling M R.Width and thickness of fluvial channel bodies and valley fills in the geological record:A literature compilation and classification[J].Journal of Sedimentary Research,2006,76(5):731-770.
[21]Lorenz J C,Heinze D M,Clark J A,et al.Determination of width of meander-belt sandstone reservoirs from vertical downhole date,mesaverde group,piceance creek basin,colorada[J].AAPG Bulletin,1985,69(5):710-721.
[22]Colombera Luca,Felletti Fabrizio,Mountney Nigel-P,et al.A database approach for constraining stochastic simulations of the sedimentary heterogeneity of fluvial reservoir[J].AAPG Bulletin,2012,96(11):2143-2153.
[23]Mail A D.Architectura-element analysis:A new method of facies analysis applied to fluvial deposits[J].Earth-Science Reviews,1985,22(4):261-385.
[24]Chen Qinghua,Yang Chao,Wang Xiuling,et al.A new method for calculating oil and gas reserves based on reservoir architecture unit[J].Journal of Xi′an Shiyou University:Natural Science Edition,2008,23(2):32-34.[陈清华,杨超,王秀玲,等.基于储层构成单元的油气储量计算方法[J].西安石油大学学报:自然科学版,2008,23(2):32-34.]
[25]Zhao Wenzhi,Bi Haibing.A Discussion on the unit classification in reserve estimation[J].Oil&Gas Geology,2007,28(3):309-314.[赵文智,毕海滨.论储量评估中的单元划分[J].石油与天然气地质,2007,28(3):309-314.]
[26]Li Hongxi,Zhang Peijun,Dai Cheng,et al.Difference analysis of oil&gas reserve rule between PRMS and SEC in U.S.[J].Journal of Southwest Petroleum University:Science&Technology Edition,2016,38(5):75-80.[李洪玺,张培军,代琤,等.美国PRMS与SEC两种油气储量准则差异分析[J].西南石油大学学报:自然科学版,2016,38(5):75-80.]
[27]Ministry of Land and Resources of the People’s Republic of China.DZ/T 0217-2005Regulation of Petroleum Reserves Estimation[S].Beijing:China Standards Press,2005.[中华人民共和国国土资源部DZ/T 0217-2005石油天然气储量计算规范[S].北京:中国标准出版社,2005.]