塔河油田奥陶系缝洞型油藏储量分类评价技术
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摘要
塔河油田缝洞型油藏由于储集体的空间分布、规模大小、储集性能具有较强的非均质性,按照碎屑岩油藏计算方法提交的探明储量具有一定的不确定性。因此从开发的角度,考虑缝洞型油藏的非均质性,利用地震反射特征、地震振幅变化率大小及实钻井的产能差异对提交的探明储量进行了分类评价,把未开发储量划分为落实未开发储量,待评价一类储量、待评价二类储量、待核销储量4个小类,并论述了界定不同类别储量边界的多种技术方法。由于每种技术方法都有一定的局限性,因此需综合利用多种技术方法进行储量的评价。通过对塔河碳酸盐岩缝洞型油藏探明储量的分类评价,能够有效指导开发井位的部署,优先动用优质储量,加强待评价一类储量的评价工作,提高此类油藏的建产率,单井产能及储量动用程度。
The fractured-vuggy reservoirs in Tahe Oilfield are characterized by strong heterogeneity in spatial distribution, size,and quality of reservoirs,thus their proven reserves calculated with method formulated for clastic reservoirs are inaccurate.Therefore,their proven reserves are classified and evaluated based on the seismic reflectance signature,rate of seismic amplitude variation and difference of the measured deliverability among wells.Undeveloped reserves are divided into proved underdeveloped reserves,unevaluated ClassⅠreserves, unevaluated ClassⅡreserves,and reserves to be cancelled after verification.Various approaches are introduced for defining boundaries of reserves of different categories.As each approach has its only limitations,it is necessary to integrate multiple methods for evaluating reserves.These classification and evaluation approaches are used in the fractured-vuggy carbonate reservoirs in Tahe oilfield.The results show that they can effectively guide the emplacement of development wells,give priority to the producing of high quality reserves,strengthen evaluation of the unevaluated ClassⅠreserves,enhance single-well deliverability and ratio of producing reserves.
The fractured-vuggy reservoirs in Tahe Oilfield are characterized by strong heterogeneity in spatial distribution, size,and quality of reservoirs,thus their proven reserves calculated with method formulated for clastic reservoirs are inaccurate.Therefore,their proven reserves are classified and evaluated based on the seismic reflectance signature,rate of seismic amplitude variation and difference of the measured deliverability among wells.Undeveloped reserves are divided into proved underdeveloped reserves,unevaluated ClassⅠreserves, unevaluated ClassⅡreserves,and reserves to be cancelled after verification.Various approaches are introduced for defining boundaries of reserves of different categories.As each approach has its only limitations,it is necessary to integrate multiple methods for evaluating reserves.These classification and evaluation approaches are used in the fractured-vuggy carbonate reservoirs in Tahe oilfield.The results show that they can effectively guide the emplacement of development wells,give priority to the producing of high quality reserves,strengthen evaluation of the unevaluated ClassⅠreserves,enhance single-well deliverability and ratio of producing reserves.
引文
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[14]李珂,李允,刘明.缝洞型碳酸盐岩油藏储量计算方法研究[J].石油钻采工艺,2007,29(2):103-104. Li Ke,Li Yun,Liu Ming.Study on reserves calculating method of fractured-cavernous carbonate reservoirs[J].Oil Drilling & Production Technology,2007,29(2):103 - 104.
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[2]陈清华,孙述鹏.缝洞识别技术在塔河油田的综合应用[J].西部探矿工程,2004,16(11):69-70. Chen Qinghua,Sun Shupeng.Application of fractured vuggy recognition techniques in Tahe Oilfield[J].West-China Exploration Engineering,2004,16(11):69 -70.
[3]鲁新便,蔡忠贤.缝洞型碳酸盐岩油藏古溶洞系统与油气开发—以塔河碳酸盐岩溶洞型油藏为例[J].石油与天然气地质,2010,31(1):22-27. Lu Xinbian,Cai Zhongxian.A study of the paleo cavern system in fractured vuggy carbonate reservoirs and oil/gas development—taking the reservoirs in Tahe oilfield as an example[J]. Oil & Gas Geology,2010,31(1):22 -27.
[4]朱定,孙素琴,蒋进勇.分频解释技术在塔河油田储层预测中的应用[J].石油与天然气地质,2010,31(1):49-53. Zhu Ding,Sun Suqin,Jiang Jinyong.Application of frequency division interpretation technique to reservoir prediction in Tahe oilfield[J].Oil & Gas Geology,2010,31(1):49-53.
[5]宋立新,陈超,赵庆辉.已探明未动用储量评价方法研究[J].特种油气藏,2001,8(2):6-50. Song lixin,Chen Chao,Zhao Qinghui.Evaluation methods for proven but untapped reserve[J].Special Oil & Gas Reservoirs 2001,8(2):6-50.
[6]张为民,薛培华.探明未开发储量的灰色评价方法[J].石油学报,1999,20(4):29-33. Zhang Weimin,Xue Peihua.Gray estimate method for the proved non-predicting reserve evaluation[J].Acta Petrolei Sinica,1999,20(4):29-33.
[7]赵迎月,顾汉明,李宗杰,等.塔中地区奥陶系典型地质体地震识别模式[J].吉林大学学报(地球科学版),2010, 6(40):1262-1270,1286. Zhao Yingyue,Gu Hanming,Li Zongjie,et al.The seismic wave field recognition mode of typical geological bodies in the ordovician in Tazhong area[J].Journal of Jilin University (Earth Science Edition),2010,6(40):1262 - 1270,1286.
[8]孙东,潘建国,潘文庆,等.塔中地区碳酸盐岩溶洞储层体积定量化正演模拟[J].石油与天然气地质,2010,31 (6):871 -878,882. Sun Dong,Pan Jianguo,Pan Wenqing,et al.Quantitative forward modelling of cavity volume in carbonate reservoirs in Tazhong area[J].Oil & Gas Geology,2010,31(6):871 - 878,882.
[9]龙喜彬.塔河油田缝洞型油藏未动用储量评价及开发对策探讨[J].内蒙古石油化工,2009,13:124-127. Long Xibin.Discussion for evaluationd and development policies of non-producing reserves of the crack and hole reservoir of Tahe oilfield[J].Inner Mongulia Petrochemical Industry, 2009,13:124-127.
[10]牛彦良,吴畏.未动用储量优选评价分析方法[J].石油学报,2006,27(Z1):115-118. Niu Yanliang,Wu Wei.Optimized selection and evaluation method for nonprodueing reserves[J].Acta Petrolei Sinica, 2006,27(Z1):115-118.
[11]何鲜,石占中,周宗良.难动用储量油藏评价方法[M].北京:石油工业出版社,2005,1-196. He Xian,Shi Zhanzhong,Zhou Zhongliang.Exploiation technologies difficult-to-production reserves[M].Beijing:Petroleum Industry Press,2005,1 -196.
[12]曲丽,徐宏.桩西采油厂未开发储量评价及对策[J].油气井测试,2004,13(3):27-30. Qu Li,Xu Hong.Evaluation and strategy for no exploit reserves in ZhuangXi production factory[J].Well Testing, 2004,13(3):27-30.
[13]荣元帅,刘学利,杨敏.塔河油田碳酸盐岩缝洞型油藏多井缝洞单元注水开发方式[J].石油与天然气地质,2010, 31(1):28-32. Rong Yuanshuai,Liu Xueli,Yang Min.A discussion on water flooding in the multi-well fractured vuggy units of carbonate reservoirs in Tahe oilfield[J].Oil & Gas Geology,2010,31 (1):28-32.
[14]李珂,李允,刘明.缝洞型碳酸盐岩油藏储量计算方法研究[J].石油钻采工艺,2007,29(2):103-104. Li Ke,Li Yun,Liu Ming.Study on reserves calculating method of fractured-cavernous carbonate reservoirs[J].Oil Drilling & Production Technology,2007,29(2):103 - 104.
[15]刘子良,司云革,于孝玉,等.吉林油田未动用难采储量评价技术方法[J].中国石油勘探,2003,8(3):65-68. Liu Ziliang,Si Yunge,YuXiaoyu,et al.Evaluation methods for non-producing difficult-to-recover reserves in jilin oilfield [J].China Petroleum Exploration,2003,8(3):65 -68.
[16]姜福聪.长垣南部扶余油层未动用储量储层评价及优选[J].大庆石油地质与开发,2005,24(6):31-32. Jiang Fucong.Study on economic producing of unproducing reserves in Fuyu reservoirs in southern placanticline[J].Petroleum Geology & Oilfield Development in Daqing,2005,24(6): 31 -32.
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