海相油气地质2025，Vol.30Issue(3)：239-254,16.DOI:10.3969/j.issn.1672-9854.2025.03.005
四川盆地华蓥山断裂西侧低缓构造区石炭系黄龙组成藏条件与勘探潜力
Hydrocarbon accumulation conditions and exploration potential of the Carboniferous Huanglong Formation in low-relief structural zone on the west side of Huayingshan Fault,Sichuan Basin
摘要
Abstract
For the Carboniferous Huanglong Formation,an important natural gas production layer in Sichuan Basin,in low-relief structural zone on the west side of Huayingshan Fault,there are still problems of unclear accumulation conditions and undetermined favorable exploration zones due to low exploration degree.Based on exploration wells,2D and 3D seismic data,a new round of evaluation is conducted on the distribution of strata,lithofacies paleogeography,and natural gas accumulation conditions of Huanglong Formation on the west side of Huayingshan Fault.The results show that:(1)The residual strata of Huanglong Formation with thickness mainly between 10-40 m are widely distributed(about 13 100 km2),and about 4 000 km2 according to the new seismic interpretation is added in the northern Sichuan Basin.(2)The intertidal shoal dolomites are widely developed(about 8 200 km2),mainly in the Huanglong Member 2,followed by the Huanglong Member 3.The newly discovered Pingchang-Bazhong shoal belt covers an area of about 2 000 km2.The thickness of dolomite reservoir of the shoal facies in HuangLong Member 2 is mainly 2-20 m.The reservoir has good physical properties,with an average porosity of 3.90%.(3)The source rocks of Wufeng Formation-Longmaxi Formation in the northern Sichuan Basin are widely developed covering an area of about 25 000 km2,and the total thickness is 50-150 m in which the high-quality is 10-60 m.The source rocks of Wufeng Formation-Longmaxi Formation and the reservoirs of Huanglong Formation form favorable reservoir combination of lower generation and upper storage.(4)Controlled by the paleo-uplift slope zone,strata denudation zone,and large fault zone,the Huanglong Formation has developed two large trap groups,i.e.,Pingchang-Bazhong,and Guang'an-Quxian,with diverse trap types dominated by lithological-stratigraphic traps and good preservation conditions.Four favorable exploration areas are predicted,indicating a promising prospect for natural gas exploration.关键词
地层分布/成藏条件/勘探潜力/黄龙组/华蓥山断裂西侧/低缓构造区/四川盆地Key words
stratigraphic distribution/hydrocarbon accumulation conditions/exploration potential/Huanglong Forma-tion/west side of Huayingshan Fault/low-relief structural zone/Sichuan Basin分类
石油、天然气工程引用本文复制引用
付小东,和源,朱可丹,徐哲航,朱心健,熊绍云,张豪,董景海,李伟,云建兵,谷明峰,李文正,应玉双,朱茂,谭万仓..四川盆地华蓥山断裂西侧低缓构造区石炭系黄龙组成藏条件与勘探潜力[J].海相油气地质,2025,30(3):239-254,16.基金项目
本文受中国石油重大科技专项所属课题"碳酸盐岩油气富集规律及有利区带研究"(编号:2023ZZ16YJ01)资助 （编号:2023ZZ16YJ01）
