CAJ | 학술논문

川东北元坝地区雷口坡组四段古岩溶储层埋藏深、非均质性强，常规地震储层预测方法难以解释储层的分布发育情况。元坝地区位于岩溶古地貌的岩溶斜坡区，微地貌对岩溶储层分布起到控制作用，其中岩溶残丘是岩溶斜坡上最有利于岩溶储层形成的微地貌单元，且发育于岩溶残丘顶部的铝质泥岩有利于气藏的保存。运用“印模法”、地震反射结构分析等方法，利用三维地震资料进行古地貌分析，采用基于匹配追踪时频分析的低频能量增强油气检测技术，最终形成了一整套古岩溶储层地震预测方法，降低了勘探风险。
천동북원패지구뢰구파조사단고암용저층매장심、비균질성강，상규지진저층예측방법난이해석저층적분포발육정황。원패지구위우암용고지모적암용사파구，미지모대암용저층분포기도공제작용，기중암용잔구시암용사파상최유리우암용저층형성적미지모단원，차발육우암용잔구정부적려질니암유리우기장적보존。운용“인모법”、지진반사결구분석등방법，이용삼유지진자료진행고지모분석，채용기우필배추종시빈분석적저빈능량증강유기검측기술，최종형성료일정투고암용저층지진예측방법，강저료감탐풍험。
The karst reservoir of the 4th Leikoupo Formation of Yuanba area in Northeast Sichuan has the deep buried depth and the strong heterogeneity character, conventional seismic reservoir prediction method is difficult to explain the distribution of reservoir development, and the prediction of distribution of reservoir is an important exploration difficulty. Yuanba area is located in the karst paleogeomorphology karst slope area, the landscape control the karst reservoir distri-bution, the karst monadnock in high slope is most beneficial to form karst reservoiration, and the aluminum shale in the top of the karst monadnock is conducive to the preservation of gas reservoir. In this paper, the " Impression method", seismic reflection structure analysis in the study area are integrated to make 3D seismic paleogeomorphology by using the oil and gas detection technology analysis, based on the time frequency analysis, finally a complete set of paleokarst reservoir prediction method was formed, thereby reducing the risk of exploration.