CAJ | 학술논문

三角洲沉积储层非均质性强，储层内部渗流特征复杂，制约油藏高效开发。以南湖油田E1 f 43油藏为例，采用基于储层构型的渗流屏障识别技术及基于多参数聚类分析和逐步判别的流动单元划分方法，结合开发动态资料，开展了渗流屏障分布规律和储层流动单元发育特征研究，分析了不同类型流动单元组合模式的连通关系，总结了渗流屏障和渗流差异对开发的影响。结果表明：（1）研究区发育连片状和条带状2种储层砂体类型，其中，条带状储层因注采井砂体分别存在于砂体和渗流屏障内而产生注水不受效，剩余油富集；（2）研究区发育5类流动单元，以II～III类为主；（3）储层连通砂体内部存在5种不同的流动单元组合模式，不同模式下的储层砂体连通关系存在差异，连通砂体内不同流动单元间形成渗流差异界面，使连通体内形成弱连通或差连通关系，制约油藏开发，造成剩余油大量富集。
삼각주침적저층비균질성강，저층내부삼류특정복잡，제약유장고효개발。이남호유전E1 f 43유장위례，채용기우저층구형적삼류병장식별기술급기우다삼수취류분석화축보판별적류동단원화분방법，결합개발동태자료，개전료삼류병장분포규률화저층류동단원발육특정연구，분석료불동류형류동단원조합모식적련통관계，총결료삼류병장화삼류차이대개발적영향。결과표명：（1）연구구발육련편상화조대상2충저층사체류형，기중，조대상저층인주채정사체분별존재우사체화삼류병장내이산생주수불수효，잉여유부집；（2）연구구발육5류류동단원，이II～III류위주；（3）저층련통사체내부존재5충불동적류동단원조합모식，불동모식하적저층사체련통관계존재차이，련통사체내불동류동단원간형성삼류차이계면，사련통체내형성약련통혹차련통관계，제약유장개발，조성잉여유대량부집。
Reservoir heterogeneity is severe and fluid flow is very complex in delta reservoir,which limits the reservoir development. Taking E1 f 43 reservoir of Nanhu Oilfield as an example,flowing barrier recognition method based on reservoir architecture and flow unit classification method based on multiparameter cluster analysis and stepwise discriminate analysis are used. Flow barrier distribution and flow unit development rule are studied with the above methods and development data. Connection of different flow unit composite models is analyzed and the influence of flow barrier and flow difference on oil development is summarized. The study revealed that:(1)developed two kinds of reservoir sandbodies,sheet sand and stripped sand. In stripped sand,water injection is usually invalid because the injection well and oil well are separately in sand and flow barrier. This forms remaining oil.(2)Developed 5 types of flow units and types II and III are the main types.(3)There are 5 different flow unit composition model in connected sand bodies which have different connectivity,which form flow difference surfaces inside connected sand bodies and weaken the permeability. These surfaces limit the reservoir development and enrich remaining oil.