含浊沸石砂砾岩储层预测标准及潜在油气富集区优选——以玛湖凹陷东斜坡下乌尔禾组为例  

Prediction criteria of laumonite-bearing sand-conglomerate reservoirs and optimization of potential oil and gas accumulation areas: taking P2w Formation in east slope of Mahu Sag as an example

作　　者：孟祥超 陈扬 谢义林[2] 郭华军 罗鑫[2] 窦洋 卢红刚[2] 郭治勇 MENG Xiangchao;CHEN Yang;XIE Yilin;GUO Huajun;LUO Xin;DOU Yang;LU Honggang;GUO Zhiyong(Hangzhou Research Institute of Petroleum Geology,CNPC,Hangzhou,Zhejiang 310023,China;Exploration and Development Research Institute of Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang 834000,China;Fengcheng Operation Area of Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石油杭州地质研究院,浙江杭州310023 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]中国石油新疆油田分公司风城作业区,新疆克拉玛依834000

出　　处：《东北石油大学学报》2020年第3期1-13,I0001,共14页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2017ZX05001-002);中国石油天然气股份有限公司科技部重大专项(2019B-0304)。

摘　　要：浊沸石是准噶尔盆地二叠系砂砾岩储层常见的胶结物,成岩成储作用复杂。以玛湖凹陷东斜坡下乌尔禾组为例,分析岩心、铸体薄片资料,采用X线衍射、电子探针能谱及RT—DEN联合约束反演等方法,构建含浊沸石砂砾岩储层测井定量识别图版,优选浊沸石溶孔砂砾岩储层油气富集区。结果表明:对于更靠近研究区湖盆中心的P 2 w 31油层,规模浊沸石溶孔储层的发育程度及油气富集条件更佳。含浊沸石砂砾岩储层预测标准为电阻率不小于20.0Ω·m,密度不大于2.46 g/cm^3,按照“垂向上,累计含浊沸石砂砾岩储层厚度大于6 m;平面上,单块面积大于40 km 2;含浊沸石砂砾岩储层厚度—主成藏期古鼻凸—通源断裂综合配置佳”的约束原则,P 2 w 31油层优选规模浊沸石溶孔油气富集区块4个、总面积201 km 2。其中,B、C区块为Ⅰ类潜在油气富集区;A区块西侧低井控区及D区块为Ⅱ类潜在油气富集区。该结果为玛湖凹陷斜坡区及其他盆地浊沸石溶孔储层定量预测提供借鉴。Laumonite is the common cement in Permian conglomerate reservoir in Junggar Basin,its diagenesis and storage are complex,so far as P 2 w Formation in east slope of Mahu Sag is concerned.Through comprehensive analysis of cores,casting slices,X-ray diffraction,electron probe energy spectrum and RT-DEN joint constraint inversion,the quantitative logging identification chart of laumonite-bearing conglomerate reservoir was constructed to optimize oil and gas enrichment region of laumonite-bearing conglomerate reservoir.The results show that P 2 w 31 oil-layer closer to the center of the source rock meets the requirement of better development of scale laumonite dissolution pore reservoir and better conditions for oil and gas enrichment.Establishing the quantitative prediction criteria of laumonite-bearing conglomerate reservoir,RT is not less than 20.0Ω·m,DEN is not less than 2.46 g/cm 3.In accordance with such constraint principles as vertically,the cumulative thickness of the laumonite-bearing zeolite sandstone reservoir is greater than 6 m,in a plane,single-block-area is larger than 40 km 2,and the favorable match of laumonite-bearing conglomerate reservoir thickness,main-reservoiring-stage convex and master-fault.Optimizing 4 oil and gas enrichment blocks with a total area of 201 km 2 in P 2 w 31 oil-layer,among which,block B and C for the first favorable region;the west side of block A and block D for the second favorable region.It is hoped that this paper can provide reference for quantitative prediction of laumonite-bearing conglomerate reservoir in the slope area of Mahu Sag and other basins.

关 键 词：玛湖凹陷 下乌尔禾组 浊沸石 砂砾岩储层 预测标准 油气富集区 离子交换性能 

分 类 号：TE122.2[石油与天然气工程—油气勘探]