CAJ | 학술논문

渤南油田义65块为开发了30多年的低渗透油藏，主力油层为沙河街组三段9砂组。在开发后期，利用岩心、地质和丰富的测井、开发资料，对沉积特征及沉积微相的展布进行再认识，确认其为浊积扇沉积，按沉积特征可进一步划分出内扇、中扇和外扇3个亚相及若干微相。并对各亚相、微相特征进行了描述，分小层绘制了沉积微相平面分布图。中扇亚相是义65块浊积扇体的主体部分，根据沉积特征可细分为辫状水道微相、辫状水道间微相、辫状水道侧缘微相、朵状体微相。中扇辫状水道微相和朵状体微相储层最为发育。平面上，各小层以辫状水道为中心，向外依次发育水道间、辫状水道侧缘和扇缘沉积微相，在部分辫状水道末端发育朵状体，水道展布方向为南-北向或东南-西北向。
발남유전의65괴위개발료30다년적저삼투유장，주력유층위사하가조삼단9사조。재개발후기，이용암심、지질화봉부적측정、개발자료，대침적특정급침적미상적전포진행재인식，학인기위탁적선침적，안침적특정가진일보화분출내선、중선화외선3개아상급약간미상。병대각아상、미상특정진행료묘술，분소층회제료침적미상평면분포도。중선아상시의65괴탁적선체적주체부분，근거침적특정가세분위변상수도미상、변상수도간미상、변상수도측연미상、타상체미상。중선변상수도미상화타상체미상저층최위발육。평면상，각소층이변상수도위중심，향외의차발육수도간、변상수도측연화선연침적미상，재부분변상수도말단발육타상체，수도전포방향위남-북향혹동남-서북향。
The major pay zone of Yi 65 block in Bonan Oilfield,a low permeability reservoir in production over 30 years, is the 9th sand unit of the 3rd Member of Shahejie Formation ( Es3(9) ).Nowadays,Yi65 block is at the later production stage .Based on the core ,geologic ,well logging and production data ,we restudied the sedimentary features and microfacies of the major pay zone in the study area .The results show that it is turbidite fan deposit ,and can be further divided into three subfacies(inner fan,mid-fan and outer fan)and several microfacies.We described the subfacies and microfacies and mapped the distribution of the sedimentary microfacies of each sublayer .The mid-fan is the main part of the turbidite fan in the study area ,and can be further divided into braided channel ,inter-braided channel ,lateral wing of braided channel and lobes.Reservoirs of the braided channel and lobes are best developed .On plane view,the braided channel occurs in the central part ,with the inter-braided channel ,lateral wing of braided channel and lower fan occurring successively outwards . The lobes occur at the end of some braided channel .And the briaded channels are of SN-trending or SE-NW-trending .