塔河油田二区奥陶系优势储集体特征及控制因素

发布时间：2018-06-15 17:55

本文选题：碳酸盐岩 + 储集体　；参考：《吉林大学学报(地球科学版)》2017年01期

【摘要】：塔河油田二区奥陶系碳酸盐岩油藏储集体类型由缝洞型、高能微孔隙型、压溶孔缝型组成。通过岩心薄片观察并结合地震、测井、录井和试油等资料,查明了受次生溶蚀作用控制的岩溶缝洞型、受高能沉积相带控制的微孔隙型和受压溶作用及白云化作用控制的压溶孔缝型储层的特征和分布,并且识别出溶蚀孔洞、溶蚀缝、构造缝、粒内孔、粒间孔、铸模孔、晶间孔、晶内孔、缝合线和微裂缝10种储集空间。实际上,上述储集体主要为高能沉积相带形成的颗粒灰岩演化而成,这些颗粒灰岩经过埋藏压实和胶结等作用形成了以次生微孔隙为主的微孔隙型储集体,经过压溶和白云岩化作用形成了受成岩演化控制的压溶孔缝型储集体,在塔北奥陶系岩溶期形成了岩溶缝洞型储集体。塔河油田二区南部受沉积相展布和成岩作用影响,颗粒灰岩和云斑状灰岩发育;北部古隆起风化剥蚀作用较强,发育大型溶洞储层;东部斜坡带古河流发育,溶蚀缝洞储层多沿古河道分布;西部受深大断裂控制,溶蚀孔洞沿断裂垂向发育。
[Abstract]:The reservoir types of Ordovician carbonate reservoirs in area 2 of Tahe Oilfield consist of fracture-cavity type, high-energy micro-pore type and pressure-solution pore fracture type. Based on the observation of thin slice of core and the data of seismic, logging, logging and oil testing, the karst fracture and cavity type controlled by secondary dissolution is found out. The characteristics and distribution of micropore types controlled by high-energy sedimentary facies belts and pressure-solution fracture-type reservoirs controlled by pressure solution and dolomitization, and the identification of dissolution pores, dissolution fractures, structural fractures, intragranular pores, intergranular pores, mold holes, intergranular pores, There are 10 kinds of storage spaces for intergranular pores, suture lines and microcracks. In fact, these reservoirs are mainly formed by the evolution of granular limestone formed by high-energy sedimentary facies belts, which formed microporous reservoirs with primary secondary micropores through burial compaction and cementation. Through pressure-dissolution and dolomization, the pressure-solution pore type reservoir controlled by diagenetic evolution was formed, and the karst fracture-cavity type reservoir was formed in the Ordovician karst period in northern Tarim. The southern area of Tahe Oilfield is affected by sedimentary facies distribution and diagenesis, granulite and cloud porphyry limestone are developed, weathering and denudation in the northern paleouplift are stronger, large cavernous reservoirs are developed, paleofluvial in the eastern slope belt is developed, The reservoir is distributed along the paleochannel, the western part is controlled by deep and large faults, and the solution hole develops vertically along the fault.
【作者单位】：中国石油大学地球科学与技术学院;
【基金】：国家自然科学基金项目(41404086) 国家科技重大专项(2011ZX05020-008) 山东省自然科学基金项目(ZR2014DQ007) 中国石油天然气股份有限公司科技重大专项(2012E-34-12)~~
【分类号】：P618.13

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