CAJ | 학술논문

珠海组是珠江口盆地恩平凹陷油气勘探的重要目标.运用普通薄片、铸体薄片、扫描电镜、X衍射、毛细管压力曲线等资料,对恩平凹陷珠海组的孔隙结构和成岩演化特征进行了分析,揭示了储层物性特征的主控因素.珠海组储层物性受控于沉积相,与岩石的粒度明显相关.压实作用是引起孔喉变小的主要成岩作用,而溶蚀作用产生的次生孔隙仅引起珠海组上部的孔隙度明显增加,对珠海组下部储层影响不大.根据成岩作用与孔隙度演化的关系,并结合埋藏史和地热史,建立了珠海组成岩序列与孔隙度演化模型.利用该模型,从沉积相与成岩相的叠加效应等角度对珠海组的物性特征进行了评价.
주해조시주강구분지은평요함유기감탐적중요목표.운용보통박편、주체박편、소묘전경、X연사、모세관압력곡선등자료,대은평요함주해조적공극결구화성암연화특정진행료분석,게시료저층물성특정적주공인소.주해조저층물성수공우침적상,여암석적립도명현상관.압실작용시인기공후변소적주요성암작용,이용식작용산생적차생공극부인기주해조상부적공극도명현증가,대주해조하부저층영향불대.근거성암작용여공극도연화적관계,병결합매장사화지열사,건립료주해조성암서렬여공극도연화모형.이용해모형,종침적상여성암상적첩가효응등각도대주해조적물성특정진행료평개.
Zhuhai Formation is an important prospecting object in Enping Sag of Pearl River Mouth Basin. The pore structure and di-agenesis of Zhuhai Formation were studied by means of normal thin sections, cast thin sections, SEM analysis, X-ray diffractions and mercury injection curves. The main factors controlling the reservoir properties were found out. The quality of the reservoirs of Zhuhai Formation was controlled by the sedimentary facies and related with the grain size. The decrease of porosity was mainly caused by the compaction. The secondary pores caused by the acid fluid corrosion resulted in the porosity increase of the upper part of Zhuhai Formation and had few effects on the reservoirs of the lower part of Zhuhai Formation. The porosity evolution model of Zhuhai Formation was finally constructed on the basis of burial and temperature histories and the relationship between diagenesis and porosity. The reservoir quality of different sedimentary and diagenetic facies was evaluated using the model.