塔里木盆地英买力—哈拉哈塘地区奥陶系碳酸盐岩岩溶型储层特征及成因  

Characteristics and Genesis of Ordovician Carbonate Karst Reservoir in Yingmaili-Halahatang Area,Tarim Basin

作　　者：倪新锋[1,2,3] 张丽娟[1] 沈安江 韩利军[1] 乔占峰 赵宽志[1] 

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]中国石油杭州地质研究院,杭州310023 [3]中国石油碳酸盐岩储层重点实验室,杭州310023

出　　处：《沉积学报》2011年第3期465-474,共10页Acta Sedimentologica Sinica

基　　金：国家科技重大专项(编号:2008ZX05004-002);塔里木油田公司2008年度博士后项目(编号:041009080045)资助

摘　　要：塔里木盆地近期获得重大突破的英买力—哈拉哈塘地区奥陶系碳酸盐岩油气藏在很大程度上受岩溶型储层发育的控制,深入总结其储层特征及成因机制对油气勘探开发具有重要意义。通过大量的岩芯、薄片、阴极发光、常规测井、成像测井及测试分析等资料进行综合研究,认为该区储层的基质孔渗极差,难以形成有利的储集空间,而次生孔隙(溶蚀孔洞、洞穴、裂缝等)构成了该区的主要储集空间。裂缝—孔洞型、孔洞型储集层优势发育,是最有勘探价值的储集层。(准)同生岩溶作用、层间岩溶作用、顺层岩溶作用、潜山岩溶作用、埋藏溶蚀作用是英买力—哈拉哈塘地区奥陶系岩溶储层发育的最主要成因,各种岩溶作用多期叠加、改造形成复合型优质岩溶储层。通过对岩溶作用过程的分析,认为储层的原生孔隙和沉积相带是次生孔隙形成的基础条件,岩溶作用是控制储层发育的主要因素,构造运动产生的裂缝是促进岩溶发育、控制储集体发育分布的关键因素。The carbonate karst reservoir in Yingmaili-Halahatang area which gained breakthrough recently in Tarim Basin was controlled by lithology, karstification and tectonic evolution. So, it is very important to study the characteristics and genesis of the reservoir for the exploration and development. Based on the cores, normal thin sections, cast thin sections, cathodoluminescence, FMI and testing data, the proto-pores and permeability of the Ordovician carbonate karst reservoir in the study area were poor, and itg difficult to form favorable reservoir space. However, the sec- ond pores, for example, solution pores, cavities and fractures constitute the main reservoir space, and their heterogeneity in the vertical and horizontal distribution is very strong. Reservoir space according to the combination of characteristics of the Ordovician reservoir is divided into four categories： rugs, fracture-vuggy, cavern, fracture. The types of Yingmaili area are mostly fracture and fracture-cavern, while the types of Halabatang area are vuggy and fracture-vuggy. Overall, fracture-vuggy and vuggy reservoir developed preponderantly, and they were the most excellent reservoir. Penecontemporaneous karstification, intra-strata karstification, along-strata karstification, buried-hill karstification, burial dissolution was the main genesis of the carbonate karst reservoir in Yingmaili-Halahatang area. And complex and pronounced superimposed karstification made the reservoir finally becoming potential excellent one. During the depositional period of the short-term cyclical falling in sea level, the unconsolidated carbonate sediment on the high parts of the ancient landscape exposed over the sea level to form a fabric choice of porous layer stack for further transformation of karstification as a foundation by the affection of fresh water dissolution. At the end of the Yijianfang Formation and Lianglitage Formation, Tabei area was uplifted as a whole by compression structure of Tarim Basin, making the stratified rock exposed on the surfa

关 键 词：岩溶储层 特征 成因 主控因素 奥陶系 英买力-哈拉哈塘地区 塔里木盆地 

分 类 号：P588.245[天文地球—岩石学]