四川盆地海相、湖相页岩气形成条件对比及开发策略

发布时间：2018-04-01 05:15

本文选题：页岩气　切入点：海相页岩　出处：《天然气地球科学》2017年04期

【摘要】：四川盆地页岩气勘探已在川东南—川南海相下志留统、川东—川东北湖相下侏罗统泥页岩层系获得了商业发现和工业气流,展示了四川盆地页岩气具有多领域、多层系、多类型的特点。采用氩离子抛光—扫描电镜、压汞—吸附联合测定、脉冲渗透率和X-射线衍射等实验测试方法,通过对海相、湖相泥页岩沉积相、生烃条件、储集特征、可压裂性和富集类型多方面对比表明,海相龙马溪组优质页岩主要发育于克拉通台内凹陷深水陆棚沉积,具有分布广,厚度稳定,有机碳含量高,有机质孔、页理、有机硅均发育的良好的生、储、可压裂一体的页岩气物质基础,3类页岩气富集类型(盆内超高压页岩气型、盆内缘超压页岩气型和盆外常压页岩气型),其中盆内超高压页岩气型和盆内缘超压页岩气型为最有利的页岩气勘探类型;湖相大安寨段有利的页岩与灰岩薄互层岩性组合,主要发育于最大湖进期碳酸盐岩湖泊的湖坡风暴滩与湖坡泥交替沉积环境,具累计厚度大,有机碳含量较高,粒缘孔缝发育,渗透性较好,钙质脆性矿物含量高的较好的生、储、可压裂近配的页岩气物质基础,是湖相有利的页岩气勘探类型。针对海、湖相不同类型页岩气的形成特点,开展适应性勘探开发技术的攻关,是实现多领域页岩气经济有效开发的关键。
[Abstract]:Sichuan basin shale gas exploration in the southeast of Sichuan Sichuan - the South China Sea Facies of Lower Silurian, Eastern Sichuan Lake in Northeast Sichuan is lower Jurassic shale formations have found commercial and industrial air show, multi field, Sichuan basin shale gas has a multi-layer, multi type features. Using argon ion polishing - SEM, combined determination of mercury adsorption pressure, pulse permeability and X- ray diffraction test method, based on the marine facies, lacustrine shale facies, hydrocarbon generation, reservoir characteristics, and show that the fracturing of the enrichment type multi contrast, sea horse Creek group Xiang Long shale mainly developed in craton in the sag, sedimentary facies, with wide distribution, stable thickness, high organic carbon content, organic matter pore, lamellation good development, silicone, reservoir, shale gas fracturing can be one of the material basis, 3 types of shale gas accumulation types in the basin (ultra high pressure gas shale The inner edge of the overpressure basin, gas shale and shale gas outside the basin type), the atmospheric pressure in the basin of ultra high pressure shale gas and shale gas inner overpressure basin for shale gas exploration in the most favorable type of lake facies; Daanzhai favorable shale and limestone thin interbedded lithologic combination, mainly developed in the the largest lake in Lake carbonate lake and lake mud slope storm beach slope deposition environment, with large total thickness, high organic carbon content, grain boundary pore fractured, good permeability, high brittle mineral content of calcareous well, reservoir, shale gas fracturing can be the material basis near the shale gas exploration type lake facies favorable. In the sea, forming characteristics of different types of lacustrine shale gas exploration and development technology research, carry out adaptability, is the key to realize the multi field economic development of shale gas.

【作者单位】：中国石化石油勘探开发研究院;
【基金】：中国石油化工股份有限公司科技开发部项目“四川盆地页岩气形成条件及富集规律研究”(编号:P13085)资助
【分类号】：P618.13

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