CAJ | 학술논문

采用有限差分法求解波动方程,研究了塔中地区碳酸盐岩洞穴型储集层溶洞与串珠状反射的位置对应关系、溶洞顶底调谐距离、多种串珠形态的成因机制.结果表明,溶洞位于串珠状反射的中心,溶洞顶界位于波谷,溶洞底界位于波峰处,随其高度增大而下移;塔中深层碳酸盐岩溶洞顶、底反射调谐距离为120m左右;上翘、下拉式串珠是由于偏移孔径、偏移速度过大或过小而造成.这些认识对碳酸盐岩洞穴型油气藏的勘探开发具有一定借鉴作用.
채용유한차분법구해파동방정,연구료탑중지구탄산염암동혈형저집층용동여천주상반사적위치대응관계、용동정저조해거리、다충천주형태적성인궤제.결과표명,용동위우천주상반사적중심,용동정계위우파곡,용동저계위우파봉처,수기고도증대이하이;탑중심층탄산염암용동정、저반사조해거리위120m좌우;상교、하랍식천주시유우편이공경、편이속도과대혹과소이조성.저사인식대탄산염암동혈형유기장적감탐개발구유일정차감작용.
This paper solves the wave equations by means of finite-difference method and studies the carbonate cave reservoir in Tazhong area, the corresponding position relations between the cave and the string bead-like reflectance, the tuning phenomenon between the top and bottom of the cave and the genetic mechanism of various string bead-like forms. The results indicate that the cave locates in the central position of string bead-like reflectance; the top of cave locates in wave trough, the bottom of it located in the wave peak shifts down with its height; the demarcation line of tuning phenomenon of the top-bottom reflectance is about 120 m; the various string bead-like forms is resulted from unsuitable migration aperture and migration velocity. The recognition can be instructive for exploration and development of carbonate cave- fractured reservoirs.