川西坳陷东坡沙溪庙组储层精细解释

发布时间：2018-03-07 11:20

本文选题：川西坳陷东坡　切入点：沙溪庙组　出处：《长江大学》2017年硕士论文　论文类型：学位论文

【摘要】：川西坳陷是沿龙门山冲断带前缘发育的山前带由西向东逐渐过渡形成的坳陷带,面积约80000km2,包括中江-回龙、高庙-丰谷和知新场三个地区。川西坳陷东坡沙溪庙组自下而上发育了沙三段、沙二段、沙一段。沙溪庙组沉积以砂泥岩互层组合为主,主要表现为辫状河三角洲沉积特征。沙溪庙组具有良好的油气生成、储存、运聚和成藏条件,但是随着勘探开发程度越来越高,油气资源开采难度越来越大,以及由于测井序列不一、岩性多样、油气水分布复杂等因素限制了对储层的研究与认识。因此,本论文在前人研究的基础上,利用地质资料、测井资料、钻井资料、试气资料、岩心薄片以及生产动态等资料,首先对测井资料进行预处理并分析储层的“四性关系”,进而建立针对研究区储层的油气水识别标准及图版,正确地进行油气水识别并对储层进行描述评价,分析出研究区的有利油气区,指导该区油气的勘探开发。本论文通过以上研究,取得如下成果:(1)研究区储层为低孔低渗储层,普遍储层物性差,自然渗流能力弱;(2)建立了该地区流体识别图版,气层AC"g71Ω.m,RD"g24μs/m;(3)经过经验统计法确定该区沙溪庙组有效储层的孔隙度下限为6.5%,渗透率下限为0.05md,经与储层岩心实验室测定孔隙度进行线性回归对比分析表明解模型具有较高的可靠性,满足储量标准精度要求。(4)根据岩性、物性等因素将研究区储层划分为三类。综合评价认为I类储层储集性能最好,孔隙度大于12.5%,渗透率大于0.25md。
[Abstract]:The western Sichuan depression is a depression formed gradually from west to east along the front edge of Longmen Mountain thrust belt, covering an area of about 80000km2, including Zhongjiang and Huilong. The three regions of Gaomiao Fenggu and Zhixinchang. The Sha3 member, the second member of Shahejie and the first member of Shayi are developed from the bottom to the top of Shaximiao formation on the east slope of western Sichuan depression. The sedimentary of Shaximiao formation is mainly composed of sand and mudstone interbed assemblages. The Shaximiao formation has good conditions for oil and gas generation, storage, migration and accumulation, but with the increasing degree of exploration and development, the exploitation of oil and gas resources becomes more and more difficult. And because of different logging sequence, diverse lithology, complex distribution of oil, gas and water, etc., this paper makes use of geological data, logging data, drilling data and gas test data on the basis of previous studies. Based on the core sheet and production performance, the logging data are preprocessed and the "four-sex relationship" of the reservoir is analyzed, and the oil-gas-water identification standard and chart for the reservoir in the study area are established. Correctly identify oil, gas and water and describe and evaluate the reservoir, analyze the favorable oil and gas area in the study area, and guide the exploration and development of oil and gas in this area. Through the above research, we have obtained the following results: 1) the reservoir in the study area is low porosity and low permeability reservoir. The universal reservoir physical property is poor, and the natural seepage ability is weak. Ac "g 71 惟路m ~ 1 Rd" g 24 渭 s / m ~ (3)) determined by empirical statistics, the lower limit of porosity and permeability of effective reservoir in Shaximiao formation in this area is 6.5 and 0.05 mdrespectively. The linear regression and contrast analysis with reservoir core laboratory shows that the solution model has high reliability. According to lithology, physical properties and other factors, the reservoirs in the study area are divided into three categories. The comprehensive evaluation shows that the reservoir performance of class I reservoir is the best, the porosity is more than 12.5 and the permeability is more than 0.25 md.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P631.81

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