CAJ | 학술논문

断陷湖盆缓坡带是油气运移的优势指向区,具备形成岩性地层油气藏的优越条件.本文采用地球物理技术与石油地质分析相结合的方法,分析了T17断块岩性地层油气藏的地质特征与油气展布规律,认为:(1)油气成藏受不整合面、岩性及构造因素综合控制;(2)单个含油砂体的油层在上倾部位受储层超覆尖灭线控制,下倾方向受油水界面控制;(3)多个含油砂体叠和构成了岩性地层油气聚集区带,整个区带油气层纵向上呈阶梯状产出,平面上由构造低部位向构造高部位呈条带状展布.据此,总结该区油气藏的高效勘探开发模式,并应用到该断块的勘探开发实践中,取得了较好的效果.
단함호분완파대시유기운이적우세지향구,구비형성암성지층유기장적우월조건.본문채용지구물리기술여석유지질분석상결합적방법,분석료T17단괴암성지층유기장적지질특정여유기전포규률,인위:(1)유기성장수불정합면、암성급구조인소종합공제;(2)단개함유사체적유층재상경부위수저층초복첨멸선공제,하경방향수유수계면공제;(3)다개함유사체첩화구성료암성지층유기취집구대,정개구대유기층종향상정계제상산출,평면상유구조저부위향구조고부위정조대상전포.거차,총결해구유기장적고효감탐개발모식,병응용도해단괴적감탐개발실천중,취득료교호적효과.
The gentle slope of faulted basin is the favorable area for petroleum migration,where the accumulation condition is advantageous.This paper present a case study on the Tiejianglu oilfield,adopting new geophysical techniques combined with analytic technologies in petroleum geological research,analysis accumulation characteristics and hydrocarbon distribution of lithostratigraphic reservoirs in the gentle slope of faulted basin.The result shows that the controlling factors for hydrocarbon accumulation consist of unconformity,lithological condition and structure.In the updip direction,single oil-bearing sandbody is controlled by the overlap-denudation pitching-out line of reservoirs and in the downdip direction,it is restricted within the boundary of oil-water interface.Multiple superimposed oilbearing sands forrn the lithostratigraphic oil-gas accumulation zones.The oil and gas reservoirs are distributed in a series of cascade downward and stripped from lower location to high location of the structure transverse.Accordingly,an efficient strategy of exploration and development for reservoirs is summarized have been applied to the Tjiejianglu oilfieled with satisfactory results.