十三间房水西沟群煤系烃源岩生烃条件及资源潜力  

Hydrocarbon Generation Conditions and Resource Potential of Coal Measure Source Rocks in Shuixigou Group of Shanjianfang

作　　者：白栋 肖晖 王振豪[3] Bai Dong;Xiao Hui;Wang Zhenghao(School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an,Shaanxi,710065,China;Shanxi Key Laboratory of Petroleum Accumulation Geology,Xi’an Shiyou University,Xi’an,Shaanxi,710065,China;The First Oil Production Plant,PetroChina Changqing Oilfield Company,Xi'an,Shaanxi,710021,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065 [3]中国石油长庆油田公司第一采油厂,陕西西安710021

出　　处：《新疆地质》2023年第2期226-232,共7页Xinjiang Geology

基　　金：陕西省教育厅重点研究计划(17JS109);陕西省科技厅研究发展计划项目(2012JQ5011)联合资助。

摘　　要：据录井和岩样分析化验等资料,结合ΔLogR技术和油气资源评价方法(成因法),对十三间房水西沟群煤系烃源岩生烃条件和油气资源潜力进行分析和预测。结果表明:研究区水西沟群泥岩有机质丰度随埋深由好变差,并受控于古水深变化,有机质类型为Ⅱ2-Ⅲ型,煤为中等烃源岩,了墩以北处于成熟阶段且拟合古地温梯度达3.8℃/100 m;水西沟群山前带发育滨浅湖-沼泽相,发育较厚有效烃源岩。产烃率图版、烃源岩厚度和资源量预测结果分析表明,该区泥岩生烃能力强于煤并受控于烃源岩厚度;西山窑组为该区主力生烃层,八道湾组天然气资源贡献不低。水西沟群石油和天然气预测资源量分别为(52.20~85.183)×10^(6)t、(77.94~118.89)×10^(8)m^(3),证实十三间房水西沟群生烃条件优越,资源量丰富,可为油气藏形成提供强有力的物质基础。Based on logging data and rock sample analysis,combined withΔLogR technology and oil and gas resource evaluation method(genetic method),the hydrocarbon generation conditions and oil and gas resource potential of shuixi-gou group coal measure source rocks in Shanjianfang area are analyzed and predicted.The results show that the organic matter abundance of mudstone in shuixigou Group in the study area changes from good to bad with burial depth and is controlled by paleo-water depth.The organic matter type is typeⅡ2-Ⅲ,and the coal is a medium source rock.The north of Zhuangdun is in mature stage and the paleogeothermal gradient is 3.8℃/100m.The shoreline-shallow lacustrine marsh facies is developed in the front zone of shuixigou mountains,and thick effective source rocks are developed.The analy-sis of hydrocarbon generation rate chart,source rock thickness and resource amount shows that mudstone is stronger than coal in hydrocarbon generation capacity and is controlled by the thickness of source rock.Although Xishanyao For-mation(J2x)is the main hydrocarbon generation layer in this area,the contribution of Badaowan Formation(J1b)to hy-drocarbon resources is not low.The predicted oil and gas resources of Shuixigou group are 52.20×10^(6)~85.183×10^(6) t and 77.94×10^(8)~118.89×10^(8)m^(3),It is proved that the shuixigou Formation of Shanjianfang has superior hydrocarbon genera-tion conditions and abundant resources,which can provide a strong material basis for the formation of oil and gas reser-voirs.

关 键 词：十三间房地区 水西沟群 煤系烃源岩 ΔLogR技术 生烃能力 资源量 

分 类 号：P618.130.2[天文地球—矿床学]