摘要
五探1井是川东地区唯一钻达寒武系和震旦系地层的风险探井,通过分析寒武系龙王庙组储层流体包裹体特征进行成藏研究,对于明确川东地区下古生界天然气勘探潜力意义重大。五探1井龙王庙组储层流体包裹体宿主矿物为白云岩,具有两期发育特征,分别对应志留纪-泥盆纪生烃初期成藏阶段和泥盆纪-中三叠世古油藏成藏阶段,包裹体均一温度小于180℃,缺乏后期的原油裂解生气期和调整充注期;综合保存条件分析认为,五探1井寒武系含气性较差,但有利于天然气向上覆的中浅层运聚成藏,可能为该区下一步的勘探方向。
Wutan-1 well is the only risk well in eastern Sichuan to drill Cambrian and Sinian strata.It is of great significance to study the reservoir forming by analyzing the fluid inclusion characteristics of the reservoir in Longwangmiao formation of Cambrian,so as to clarify the exploration potential of lower Paleozoic natural gas in East Sichuan.The host mineral of fluid inclusions in the Longwangmiao formation of Wutan-1 well is dolomite,which has two stages of development characteristics,corresponding to Silurian-Devonian initial hydrocarbon generation stage and Devonian Middle-Triassic paleo reservoir formation stage respectively.The homogenization temperature of inclusions is less than 180℃,lacking of late cracking gas generation period and adjustment of filling period.According to the analysis of comprehensive preservation conditions,the Cambrian gas bearing property of Wutan-1 well is poor,but it is beneficial to the migration and accumulation of natural gas to the overlying medium shallow layer,which is the next exploration direction in this area.
作者
张文济
叶朝阳
李世临
郭艳波
姜华
徐发波
ZHANG Wenji;YE Chaoyang;LI Shilin;GUO Yanbo;JIANG Hua;XU Fabo(Chongqing Gas Field,PetroChina Southwest Oil&Gas Field Company,Chongqing 400021,China;Exploration&Development Research Institute,PetroChina,Beijing 100083,China)
出处
《石油地质与工程》
CAS
2020年第4期19-23,共5页
Petroleum Geology and Engineering
关键词
川东地区
龙王庙组
包裹体
均一温度
成藏期次
eastern Sichuan region
Longwangmiao formation
inclusions
homogenization temperature
reservoir forming stages
