齐家北地区FI1油层成岩特征及有利储层预测

DIAGENESIS FEATURES AND FAVORABLE RESERVOIR PREDITION OF F I 1 OIL LAYER IN NORTH QIJIA

选取古地温、镜质组反射率、自生石英和浊沸石的体积分数、蒙皂石的相对体积分数等参数，在成岩场内分别进行单项成岩作用的数值模拟，并将这些指标组合成一个能够综合反映成岩作用强度且便于成岩阶段划分的成岩指数（ID）。综合分析认为齐家北古708区块FI1油层成岩阶段可分为中成岩的A1、AⅡ和B期，主要分布在AⅡ期。AⅡ期成岩作用有利于原生孔隙和次生孔隙的发育，沉积相、成岩相和烃类充注等3个主控因素共同控制了储层物性的演化，沉积相控制原生孔隙的发育及演化，烃类充注和成岩相控制次生孔隙的发育。最后指出了古708区块FI1油层储层物性的有利区带。

The numerical simulations are conducted respectively for individual diagenesis in these diagenesis field by the following chosen parameters： paleotemperature, Ro, self-quartz ＆ turbid zeolite volumetric fractions and the relative volumetric fractions of smectite. At the same time, a diagenetic index { ID } that can comprehensively re- fleet the diagenesis intensity and facilitates dividing the facieses of diagenesis is constituted by the combination of these parameters. The complex analyses show that F I 1 oil layer of GUT08 Block of North Qijia can be classified as diagenesis period A I , A]I and B, mainly distributed in A I1 Period. The diagenesis in A 11 Period is beneficial to the developments of primary and secondary porosities, three main controlling factors such as sedimentary and diage- netic facieses and hydrocarbon charge totally determine the evolution of the pl^ysical properties of the reservoir, the sedimentary facies dominates the development and evolution of the primary porosity, the other two factors controls the development of the secondary porosity. Finally the favorable blocks of the physical properties of the reservoir in F I 1 oil layer in Gu708 Block are pointed out.