CAJ | 학술논문

以塔里木盆地西北缘震旦系露头为主要研究对象,通过地质观察、镜下鉴定与孔渗分析等研究手段,较为系统地研究了上震旦统白云岩储层的类型及其发育特征.储层主要发育四种成因类型:古岩溶型、微生物型、结晶型和热液改造型.古岩溶储层广泛发育于上震旦统的顶部,溶蚀孔洞极其发育,但区域分布差异较大,受控于古构造隆起而呈带状分布;微生物白云岩储层主要发育于上震旦统的中上部,以发育与微生物结构相关的多种溶蚀孔隙为主,以低孔特低渗为特征,但横向上分布稳定,规模大,相控作用明显,为深层具有一定规模的致密储层;结晶白云岩储层以晶间孔、溶蚀孔为主,其孔隙度与渗透率具有正相关性,为低孔低渗储层,且分布局限,呈楔状或透镜状分布;热液改造型储层以与热液溶蚀作用有关的溶蚀孔洞或残余晶间孔为主,主要发育于肖尔布拉克地区,分布较为局限,多与深部大断裂有关.
이탑리목분지서북연진단계로두위주요연구대상,통과지질관찰、경하감정여공삼분석등연구수단,교위계통지연구료상진단통백운암저층적류형급기발육특정.저층주요발육사충성인류형:고암용형、미생물형、결정형화열액개조형.고암용저층엄범발육우상진단통적정부,용식공동겁기발육,단구역분포차이교대,수공우고구조륭기이정대상분포;미생물백운암저층주요발육우상진단통적중상부,이발육여미생물결구상관적다충용식공극위주,이저공특저삼위특정,단횡향상분포은정,규모대,상공작용명현,위심층구유일정규모적치밀저층;결정백운암저층이정간공、용식공위주,기공극도여삼투솔구유정상관성,위저공저삼저층,차분포국한,정설상혹투경상분포;열액개조형저층이여열액용식작용유관적용식공동혹잔여정간공위주,주요발육우초이포랍극지구,분포교위국한,다여심부대단렬유관.
There are outcropping Upper Sinian carbonate rocks in the northwestern margin of Tarim basin.Based on field investigation and experimental analysis of outcrop samples,four types of carbonate reservoirs are recognized and the characteristics of them are as follows: (a) Paleokarst reservoirs,in which solution pores and caves are general and various,widely develop in the weathering crust on the top of the Upper Sinian strata.They are the best reservoirs in this area.(b) Microbial dolostone reservoirs,in which various microfabric-associated solution pores are common,develop in the middle and upper parts of the Upper Sinian strata.They are a sort of deeply-buried tight reservoirs with low porosity and extremely low permeability.(c) Crystalline dolostone reservoirs,in which intercrystal and solution pores are typical,are characteristic of low porosity and low permeability and are locally distributed.(d) Thermal-altered dolostone reservoirs,in which hydrothermal dissolved pores and caves or residual intercrystal pores are common,are distributed only in some local area (such as Xiaoerbulake) where great faults develop in deep.