准噶尔盆地腹部侏罗系油气运移路径模拟  

Simulation of oil and gas migration pathways for Jurassic in hinterland of Junggar Basin

作　　者：郭秋麟[1] 吴晓智[1] 卫延召[1] 柳庄小雪 刘继丰 陈宁生[1] GUO Qiulin;WU Xiaozhi;WEI Yanzhao;LIU-ZHUANG Xiaoxue;LIU Jifeng;CHEN Ningsheng(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;Beijing Tianteng Grid Technology Co,Ltd.,Beijing 100095,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]北京天腾网格技术开发有限公司,北京100095

出　　处：《岩性油气藏》2021年第1期37-45,共9页Lithologic Reservoirs

基　　金：国家科技重大专项“深层-超深层油气藏地质特征、分布规律与目标评价”(编号:2017ZX05008-006);中国石油天然气股份有限公司重大科技项目“陆相中高成熟度页岩油勘探开发关键技术研究与应用”(编号:2019B-0301);“大中型岩性地层油气藏富集规律与关键技术”(编号:2019E-2601)联合资助。

摘　　要：2019年在准噶尔盆地钻探的前哨2探井取得重大突破,预示着盆地腹部侏罗系具有广阔的勘探前景。腹部发育远源和次生油气藏,源与储之间距离大,油气运移路径决定了油气藏的分布。基于研究区侏罗系油气主要沿断裂垂向运移、沿砂体侧向运移的特点,制定了以三维地质建模、参数研究和模拟计算为核心的研究思路,提出了断面网格的三维地质建模方法和考虑断裂因素的三维侵入逾渗模型及原油含蜡量定量模型,构建了侏罗系三维地质体,包括54844个体网格、12370个面网格及相应的地质参数。模拟得出:运移路径与油气藏分布相关性较好,原油含蜡量与实测值接近,模拟的运移路径与勘探结果一致,原油含蜡量定量模型是有效的。在综合考虑油气运移路径、含油气饱和度和沉积相分布等因素后,确定5个有利区,分别为成1井区、石东1井西区、滴西2井区、董1井北区和盆6井北区。该研究成果可为研究区潜在勘探目标分布的预测提供参考。A major breakthrough was made in well Qianshao-2 in Junggar Basin in 2019,which indicates that Jurassic in the hinterland of basin has broad exploration prospects.Distant and secondary oil and gas reservoirs are developed in the hinterland of the basin.The distance between source and reservoir is large,and the hydrocarbon migration pathway determines the distribution of oil and gas reservoirs.Based on the characteristics of Jurassic oil and gas migration along the vertical direction of faults and the lateral movement along sand bodies in the study area,this paper formulated a research idea with three-dimensional geological modeling,parameter research and simulation calculation as the core,proposed a three-dimensional geological modeling method for section grids,a three-dimensional invasion percolation model considering fault factors and a quantitative model for crude oil wax content,and constructed a three-dimensional geological body for Jurassic,including 54844 individual grids,12370 surface grids and corresponding geological parameters.The simulation results show that the migration pathway has a good correlation with the distribution of oil and gas reservoirs,and the wax content of crude oil is close to the measured value,indicating that the simulated migration pathway is consistent with the exploration results,and the quantitative model of wax content of crude oil is effective.After comprehensively considering factors such as hydrocarbon migration pathway,oil and gas saturation and sedimentary facies distribution,five favorable areas were determined,including Cheng 1 well area,Shidong 1 well west area,Dixi 2 well area,Dong 1 well north area and Basin 6 well north area.The research results can provide a reference for the prediction of the distribution of potential exploration targets in the study area.

关 键 词：运移路径 运移与聚集模拟 三维地质建模 侵入逾渗 侏罗系 准噶尔盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]