通南巴地区飞仙关组三段储层成因机制探讨  

Discussion on T_1f^3 Reservoir Formation Mechanism,Tongnanba Area

作　　者：段新国[1] 李英[1] 李忠权[1] 王洪辉[1] 李仲东[1] 李德敏[1] 胡永章[2] 

机构地区：[1]成都理工大学"油气田地质及开发工程"国家重点实验室,成都610059 [2]中国石油化工股份有限公司西南油气分公司工程技术研究院,四川德阳618000

出　　处：《沉积学报》2010年第6期1165-1174,共10页Acta Sedimentologica Sinica

基　　金：国家自然科学重点基金(批准号:41030426);教育部博士点基金(编号:20095122110002);四川省博士后基金(编号:2009SCBSH-5);中国石油化工股份有限公司西南油气分公司重点项目(编号:GT860719)联合资助

摘　　要：通南巴地区飞仙关组三段储层近年获得了工业气流,储层压力较高,储层岩性主要为颗粒灰岩与泥微晶灰岩,物性较差,储集空间以铸模孔、粒内溶孔和晶间溶孔为主,且储集层横向变化大,纵向差异显著,总体看,该区储层发育欠佳。通过研究区成岩作用类型及其对孔隙演化的影响分析、成岩演化序列分析以及与邻区普光气田储层成岩作用对比分析,对通南巴地区的储层成因机制进行了深入讨论。通过研究发现,通南巴地区飞三段储层形成的主要控制因素有以下三个方面:(1)由于沉积成岩环境的限制,白云化作用非常微弱,基本不发育白云岩储层,这导致本区储层较差;(2)原生孔隙基本消失殆尽,溶蚀作用成为飞三段储层形成的关键因素,同生期的溶蚀作用在各期溶蚀作用中占主导地位;(3)由于在中—深埋藏阶段没有烃类注入,飞三段储层基本无TSR反应,破坏性成岩作用相对增强,储层无法得到改善。T1f3 reservoir in Tongnanba area obtain industrial gasflow in recent years,reservoir pressure are high,reservoir lithology mainly is grainstone and mud microcrystalline limestone,physical properties is bad.Reservoir space mainly are oolimolds,dissolve inside grainmold hole and dissolve pore.There are big changes in transverse,and significant different in longitudinal.Generally,reservoir development poor in tongnanba area.In this article,the author deeply discussed the reservoir forming mechanism of T1f3 reservoir in tongnanba area through the analysis of the diagenesis types and its influence to the porosity evolution,diagenetic evolution sequence,and contrast to which in Puguang gas field.Accoroding to the research there are three factors which controll the forming of T1f3 reservoir.Firstly：Dolomitization is very weak because of the limitation of the sedimentary and diagenetic environment,so the dolomite reservoir do not develop,which lead to the poor reservoir develop;Secondly：Primary pore disappeared basicly,dissolution become the key factor to the forming of T1f3 reservoir,syn-sedimentary dissolution are dominant among dissolution in all stages;Thirdly：There are not TSR reaction in T1f3 reservoir because of the hydrocarbon injection did not happen during the middle-deep burial stage.So the destructive diagenesis enhancement relatively can not influence resevroir quality.

关 键 词：通南巴地区 储层成因机制 白云化作用 溶蚀作用 TSR 

分 类 号：TE122.1[石油与天然气工程—油气勘探]