摘要
为正确认识黄骅坳陷千米桥古潜山奥陶系石灰岩凝析气藏的油气富集规律,提高评价井成功率,加快油气开发评价进度,进行了以分析高产井控制因素为主线的综合研究,取得了新的认识。通过对地层、构造、储层、成藏条件、含油气性等的系统研究,发现该凝析气藏的油气富集规律主要受以下7项地质因素的控制:构造位置、有利盖层分布区、岩溶发育带、风化壳发育带、断裂系统、地应力梯度、压力系统;并在地应力控制机理、裂缝分布规律研究等方面有所深化。在此基础上优选井位并实钻了2口评价水平井,取得了较好的实钻效果,证实了对千米桥古潜山奥陶系石灰岩油气富集规律认识的正确性。
For correctly understanding the hydrocarbon enrichment in the Ordovician limestone condensate gas reservoirs in the Qianmiqiao buried hill, the Huanghua depression, improving success rate of the appraisal wells, and speeding up development evaluation, a comprehensive study was performed, focusing on the main controlling factors of the high production wells. Systematic study of the stratigraphy, structures, reservoirs, pooling conditions and oil-bearing properties reveals that the enrichment of condensate gas is mainly controlled by the following seven geologic factors: structural situation, favorable cap rock range, karst zone, weathering crust zone, fault system, in-situ stress gradient, pressure system. Some innovative understandings are obtained in respects of the control mechanism of earth stress and distribution of fractures. Two horizontal appraisal wells were optimized and successfully drilled based on these understandings, verifying the understanding of hydrocarbon enrichment patterns in the Ordovician limestone condensate gas reservoirs in Qianmiqiao buried hill.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2009年第4期25-26,共2页
Natural Gas Industry
关键词
渤海湾盆地
古潜山
凝析气
油气聚集带
控制
因素
Bohai Bay basin, palaeo-buried hill, condensate gas, hydrocarbon accumulation belt, play, control, factor
