摘要
Abstract
The comprehensive analysis of drilling,logging and seismic data further makes it clear that there develop two stages restricted platform oolite,sandy beach in Lower Cambrian Longwangmiao Formation of Southwest Sichuan.On the plane,the Ziyang-Moxi area is the development center of beach,thinning to the surroundings and vertically,the early and late stage stable banks in the central area transfer and evolve into the late beach on the edge.The reservoir rocks are the dissolved pore micro-fine crystalline dolomite, beach facies psammitic dolomite, and oolite dolomite, and the reservoir spaces are dominated by the intergranular dissolved pore,intragranular dissolved pore,and intergranular dissolved pore.The physical properties of the reservoir in Ziyang-Moxi area are the middle and low porosity and permeability and the high porosity and permeability.Logging shows as low gamma,low resistance,low density,high sonic time difference,so the reservoir belongs to pore-type reservoir.Dolomitization is the basic condition to form a reservoir,and the corrosion plays a decisive role in the high-quality reservoir development.In the Ziyang-Moxi area,the reservoir thickness is 30 ~ 50 m,the porosity is 4% ~ 6%,and the reservoir develops the best.To the southwest and the south,the reservoir thickness is 10 ~ 30 m,and the porosity is 3% ~ 4%. Therefore,the Ziyang-Moxi area is the most favorable oil and gas exploration area in the Lower Cambrian Longwangmiao Formation.关键词
川西南地区/龙王庙组/浅滩/孔隙型储层/储层厚度Key words
Southwest Sichuan/Longwangmiao Formation/bank/pore-type reservoir/reservoir thickness分类
能源科技
