摘要
本文通过岩心、录井、测井、测试资料的综合研究,在塔河油田奥陶系碳酸盐岩剖面上识别出5类性质有别的储层(洞穴型、风化裂隙型、构造裂隙型、滩相颗粒灰岩溶蚀孔隙型、地表残积带裂隙-孔隙型),阐述了各类储层的储集性能及发育分布特征,并对碳酸盐岩古岩溶作用机制及岩溶洞穴层的发育控制因素进行了探讨。指出在不整合面下0～250m的深度内,区域性发育3套洞穴型储层,洞穴型储层的发育是油气高产、稳产的关键;风化裂隙型储层主要集中在海西早期不整合侵蚀面附近及洞穴层上下;构造裂隙型储层发育分布具有普遍性,海西早期构造裂隙发育状况与洞穴层发育状况之间有着良好的匹配关系;滩相颗粒灰岩溶蚀孔隙性储层具有相控和层控的特征,主要发育在塔河油田南平台一间房组上部(礁)滩相储集体中。岩溶洞穴层发育主要受岩溶地貌及裂缝发育程度控制,岩溶缓坡(特别是其上的丘丛)与阿克库勒凸起轴部的叠合部位是岩溶最发育的地区。
Based on the analysis of core, logging, well logging and test data, five types of carbonate reservoirs are distinguished, including cave, structure fracture, weathered fracture, vugular porosity of bank-facies grainstone and fracture-pore of surface residuum. Reservoir properties and distributing characteristics of the reservoirs are summed up, and the paleo-karst formation mechanism and controlling factors of the cavernous reservoir growth and distributing degree are discussed. The development of three suites of cavernous reservoirs extending 0-250 meters below the unconformity interface is the key to high-yielding and oil and gas sources. Weathered fracture reservoirs focus on the neighborhood of the early Hercynian unconformity interface and above or below the cavernous reservoirs. The growth and distribution of fracture reservoirs have universality, which is well correlated with the growth degree of the cavernous reservoirs. The vulgar porosity reservoir developing on the bank-facies grainstone of the upside Yijianfang Formation is controlled by facies and layers. The growth degree of karst cavernous reservoirs is controlled dominantly by physiognomy and fracture growth degree. The most developed area of karstification is the superposed positions of the gentle slope of karst-buried hills and the axis of the Akekule heave.
出处
《地质论评》
CAS
CSCD
北大核心
2002年第6期619-626,共8页
Geological Review
关键词
塔河油田
奥陶系
碳酸盐岩
储层特征
古岩溶作用机理
构造裂隙
Tahe oilfield
Ordovician
carbonate rock
reservoir characteristics
Paleokarstification mechanism
