离散裂缝网络建模技术在大庆油区泥岩裂缝性油气藏的应用浅析  

Application of discrete fracture network modeling technology in mudstone fractured reservoir in Daqing oil region

作　　者：魏旭 张永平 薄云鹤 郭昊 郭宇航 吴森昊 Wei Xu;Zhang Yongping;Bo Yunhe;Guo Hao;Guo Yuhang;Wu Senhao(College of Petroleum Engineering,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Research Institute of Oil Production Engineering,Daqing Oilfield Co.,Ltd.,PetroChina,Daqing,Heilongjiang 163454,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163454

出　　处：《油气藏评价与开发》2018年第4期11-16,共6页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2016ZX05046-006);东北石油大学研究生创新科研项目"徐深火山岩气田扩大改造体积数值模拟研究"(YJSJD2017-002NEPU)

摘　　要：泥岩裂缝性油气藏是一种特殊的非常规油气藏,其油气储集空间主要以裂缝为主。较多的储量使该类油气藏具有很高的工业开采价值,但由于地质情况复杂,其开发效果并不理想。为了在压裂施工前,还原地质构造并准确分析泥岩裂缝性油气藏的产能情况,充分考虑了岩心特性、井下微地震以及生产动态等资料。根据大庆地区泥岩裂缝发育层段和产状特征,结合地震等构造研究结果,以裂缝强度属性作为模型约束条件构建裂缝网络模型,并在网络模型的基础上建立人工裂缝与天然裂缝的耦合模型,从而进行压前压后产能效果分析。研究结果表明,该裂缝模型能较好地描述实际地层中天然裂缝的数量、走向等情况,并且能准确地预估压前压后的油气产量。该研究可作为大庆A地区泥岩裂缝性油气藏压前压后产能评价方法,为该区块其它井的压裂施工提供依据。The mudstone fractured oil and gas reservoir is a kind of special unconventional reservoirs and its hydrocarbon mainly exists in fractures.This kind of reservoirs has industrial exploitation value due to the large reserves,but the complex geological con,dition leads to its poor develop effects.In order to reconstruct the geological condition and analyze the production capacity of the mudstone fractured oil and gas reservoir before fracturing,the core characteristics,downhole microseismic and dynamic informa,tion of production are fully considered.According to the characteristics and production of the development layer with mudstone fractures in Daqing area,and combined with the seismic and other structural research results,we established the fracture network model,which was constrained by the crack strength attribute.Based on the network model,the coupling model of the artificial frac,ture and natural fracture is established,so that to analyze the effect before and after fracturing.The results show that the fractured model can accurately describe the numbers and direction of the natural fractures,and estimate the oil and gas production before and after fracturing.The study is used as a method for evaluating the productivity of mudstone fractured oil and gas reservoirs in ar,ea A of Daqing,and to provide the basis for the fracturing construction of other wells in this zone.

关 键 词：泥岩裂缝性油气藏 裂缝强度属性 天然裂缝 耦合模型 产能评价 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]