摘要
为研究徐家围子断陷营城组火山岩中天然气分布规律,在分析油源断裂分布及其输导天然气时期和盖层分布及其封闭能力形成时期的基础上,通过比较盖层断接厚度与其封气所需最小断接厚度的相对大小和盖层封闭能力形成时期与油源断裂输导天然气时期的相对早晚,对徐家围子断陷营城组火山岩断盖时空匹配关系进行研究,并结合天然气分布研究断盖时空匹配关系对天然气成藏与分布的控制作用。研究结果表明:徐家围子断陷营一段顶火山岩非封闭型断盖空间匹配关系区主要分布在断陷南部、中部、西部和东部相对较大油源断裂处,其余油源断裂处和油源断裂不发育区皆为封闭型断盖空间匹配关系区;登二段泥岩非封闭型断盖空间匹配关系区主要分布在断陷南部、中部和中北部相对较大油源断裂处,其余油源断裂处和油源断裂不发育区也为封闭型断盖空间匹配关系区。青山口组—姚家组沉积时期、嫩江组沉积末期和明水组沉积末期断盖时间匹配关系相对较好,而火石岭组—营城组沉积时期和古近系沉积末期匹配关系相对较差。断盖时空匹配关系对营城组火山岩天然气成藏与分布的控制作用主要表现在2个方面:封闭型断盖空间匹配关系区是营城组火山岩天然气成藏的有利区;断盖时间匹配关系控制着营城组天然气成藏时期。研究成果对指导徐家围子断陷营城组火山岩天然气勘探具有重要意义。
In order to study the distribution laws of the natural gas in Yingcheng-Formation volcanic rocks of Xujiaweizi Fault Depression,on the bases of the analyses of the oil source fault distribution and itsgas-transporting period,and moreover the distribution of the caprocks and its forming period of the sealing ability,through comparing between the caprock fault-connected thickness and its necessary minimal fault-connected thickness to seal the gas,and moreover the forming period and the transporting period,the time-space matching relationships of the fault andcaprock in Yingcheng-Formation volcanic rocks of Xujiaweizi Fault Depression were studied,and at the same time,combined with the gas distribution,the controlling actions of the relationships to the gas reservoir accumulation and distribution were researched. the study achievements indicate that non-seal matched areas for the fault and caprock on the top of Member K_1yc_1 volcanic rocks of the depression are mainly in the large oil-source faults in the middle of the south,the west and the east,the other two areasinthe oil source faults and none-development oil source faults arethe seal-typed space matching relationships. The non-seal space-matchedregions betweenthe fault and caprock in Formation K_1d_2 mudstone rocks are mainly inthe large oil source faults in the south,middle and middle-north areas,the other areas in the oil source faults and none oil source faults are seal-typed matching relationship areas. At K_2qn-K_2y,Late K_2n and Late K_2m sedimentary periods,the time matching relationships between the fault and caprock were much better,while those at K_1h-Yingcheng and Late E are on the contrary. The controlling actions of the time-space matching relationship between the fault and caprock to the gas reservoir accumulation and distribution in Yingcheng Formation volcanic rocks are mainly presented in the following two aspects： the seal-typed space matching relationship areas are the favored regions of the gas reservoir accumulation for Yingcheng-Formati
作者
王雪峰
WANG Xuefeng(Petroleum Engineering Department of Daqing Vocational College, Daqing 163254, China })
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2017年第4期9-14,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然基金项目"油源断裂转换带优势输导油气条件研究"(41372153)
关键词
徐家围子断陷
营城组
火山岩
断盖空间匹配
断盖时间匹配
控藏作用
Xujiaweizi Fault Depression
Yingcheng Formation
volcanic rock
fault-caprock space/spatial match
fault-caprock time match
reservoir controlling action
