天然气工业2026，Vol.46Issue(4)：31-41,11.DOI:10.3787/j.issn.1000-0976.2026.04.003
四川盆地中部蓬莱—高磨地区下寒武统沧浪铺组一段颗粒滩差异沉积及其控制因素
Differential sedimentation and controlling factors of grain banks in the first Member of Lower Cambrian Canglangpu Formation,Penglai-Gaomo Area of the central Sichuan Basin
摘要
Abstract
The production of high-yield industrial gas flow from the grain bank facies dolomite reservoir of the first Member of Canglangpu Formation(Cang 1 Member)in the Penglai area of the central Sichuan Basin indicates its significant exploration potential,but the differential sedimentation characteristics and controlling factors of the grain banks remain unclear,which restricts the exploration deployment.Based on core,thin section and logging data,this paper studies the basic sedimentary characteristics and differences in vertical and lateral development and areal distribution of grain banks,and then discusses the main controlling factors and models of differential sedimentation of grain banks in the Penglai-Gaomo area.The following results are obtained.First,the grain banks of Cang 1 Member in the Penglai-Gaomo area are mainly composed of oolitic limestone and oolitic dolomite.There are several upward shallowing sequences in the vertical direction,and the lateral distribution is controlled by paleogeomorphology.Second,the grain banks in the Penglai area are highly developed with good lateral continuity,while those in the Gaomo area are thin and discontinuous laterally.Third,the differential sedimentation of Cang 1 Member grain banks in the Penglai-Gaomo area are under the joint control of sea level eustacy,paleogeomorphologic pattern and terrigenous clastic input,with sea level eustacy controlling the stacking patterns of grain banks,paleogeomorphologic pattern dominating the differential areal distribution of grain banks,and terrigenous clastic input controlling the development degree of grain banks.Fourth,in the Penglai area,great tectonic uplift,elevated paleogeomorphology,and distance from terrigenous sources favors the development of thick and continuous grain banks;in the Gaomo area,however,relatively low paleogeomorphology and strong terrigenous clastic dilution lead to the formation of thin and isolated grain banks.In conclusion,the research results can provide new geological basis for hydrocarbon exploration in the dolomite reservoirs of grain banks facies in the deep Canglangpu Formation of the Sichuan Basin.关键词
四川盆地中部/蓬莱—高磨地区/下寒武统沧浪铺组/颗粒滩/差异沉积/控制因素Key words
Central Sichuan Basin/Penglai-Gaomo area/Lower Cambrian/Canglangpu Formation/Grain bank/Differential sedimentation/Controlling factor分类
能源科技引用本文复制引用
周刚,李成龙,张亚,孙海涛,李勇,严威,周力,龙虹宇,陈迪,张驰..四川盆地中部蓬莱—高磨地区下寒武统沧浪铺组一段颗粒滩差异沉积及其控制因素[J].天然气工业,2026,46(4):31-41,11.基金项目
中国石油天然气股份有限公司重大科技专项项目"海相碳酸盐岩油气规模增储上产与勘探开发技术研究"(编号:2023ZZ16YJ01)、中国石油西南油气田公司科技项目"扬子西缘震旦系—下古生界碳酸盐岩含油气系统研究"(编号:2025D00101). （编号:2023ZZ16YJ01）
