断—砂配置侧向分流输导油气的综合判别方法

为了研究含油气盆地“下生上储”式生储盖组合中油气成藏规律，在分析断—砂配置侧向分流输导油气所需条件的基础上，通过研究断—砂配置垂向输导油气能力综合评价指数（T_d）与侧向分流输导油气能力综合评价指数（T_c）的比值与砂体中油气柱高度之间的关系，建立了一套综合判别断—砂配置侧向分流输导油气的方法。利用文中方法综合判别东营组断—砂配置油气输导结果表明： ①南堡凹陷东营组67个已知断—砂配置侧向分流输导油气运移所需的最小T_c/T_d为1，若T_c/T_d值大于1，则断—砂配置侧向分流输导油气，反之则断—砂配置垂向输导油气。②NP1-5井东营组11个未知断—砂配置侧向分流输导油气的综合判别结果显示，1~6号和8号断—砂配置的T_c/T_d值均大于1，即断—砂配置侧向分流输导油气，有利于油气在砂体中聚集成藏，油气钻探为油层或油水同层； 7号和9~11号断—砂配置的T_c/T_d值均小于1，即断—砂配置垂向输导油气，不利于油气在砂体中聚集成藏，钻探结果为干层。上述结果表明，利用文中方法判别南堡凹陷东营组断—砂配置油气输导情况是可行的。

Lateral migration hydrocarbon identification in fault-sand configuration

Hydrocarbon accumulations have a law of the lower-generation and upper-accumulation source-rock-reservoir-caprock pattern.Based on the analysis of influence factors,fault-sand configuration hydrocarbon vertical migration evaluation index (T_c) and fault-sand configuration hydrocarbon lateral migration evaluation index (T_d) are obtained.Based on the relation between the ratio of the index T_c to the index T_d and hydrocarbon column height,an approach to identify fault-sand hydrocarbon lateral migration is established.This approach is used to the Dongying Formation,Nanpu Sag,and the following understandings are obtained:①For 67 known fault-sand configurations,the minimum T_c/T_d is 1.If T_c/T_d is greater than 1,it is a lateral migration,if not,vertical migration; ②For 11 unknown fault-sand configurations at Well NP1-5,the T_c/T_d of the configurations 1-6 and 8 are greater than 1,so they are lateral migration,which are favorable for hydrocarbon accumulation.The T_c/T_d of the configurations 7 and 9-11 are less than 1,they are vertical migration,which are not favorable for hydrocarbon accumulation.The latest drilling proves that the proposed approach is feasible and effective.