CAJ | 학술논문

在储层构型方法指导下，以取心井岩心和密井网测井资料为基础，借鉴现代沉积、野外露头成果，结合生产动态数据，综合多学科理论与研究成果，对胜坨油田二区沙二段8砂组密井网条件下的三角洲砂体开展了精细的储层内部构型逐级解剖，并探讨了基于构型单元储层质量分布模式。主要取得以下成果及认识：在河口坝复合体叠置样式研究基础上；按照“垂向细分”、“侧向划界”以及“平面组合”的思路，进行单一河口坝构型单元的识别划分；将研究区河口坝划分为限制性河口坝（PMB）和非限制性河口坝（DMB）。完善了单一河口坝构型模式研究，深化单一坝边界识别标志；建立了两种单一河口坝砂体内夹层分布模式。限制性单一河口坝内部夹层以泥质夹层为主，局部物性夹层，近水平状展布，将单一坝分为多期增生体；非限制性单一河口坝砂体内部增生体间的夹层以物性砂岩及钙质夹层为主，多分布在河口坝中上部，连续性较差。明确了隔夹层类型由陆向湖盆的演化规律：钙质砂岩→物性夹层→泥灰岩。基于构型单元的储层质量分布模式表明，单一构型单元分布控制着储层参数的平面展布。坝主体以发育Ⅰ类、Ⅱ类储层为主，Ⅲ类储层一般发育在河口坝内部夹层的遮挡区以及坝侧缘，Ⅳ类储层发育在席状砂。
재저층구형방법지도하，이취심정암심화밀정망측정자료위기출，차감현대침적、야외로두성과，결합생산동태수거，종합다학과이론여연구성과，대성타유전이구사이단8사조밀정망조건하적삼각주사체개전료정세적저층내부구형축급해부，병탐토료기우구형단원저층질량분포모식。주요취득이하성과급인식：재하구패복합체첩치양식연구기출상；안조“수향세분”、“측향화계”이급“평면조합”적사로，진행단일하구패구형단원적식별화분；장연구구하구패화분위한제성하구패（PMB）화비한제성하구패（DMB）。완선료단일하구패구형모식연구，심화단일패변계식별표지；건립료량충단일하구패사체내협층분포모식。한제성단일하구패내부협층이니질협층위주，국부물성협층，근수평상전포，장단일패분위다기증생체；비한제성단일하구패사체내부증생체간적협층이물성사암급개질협층위주，다분포재하구패중상부，련속성교차。명학료격협층류형유륙향호분적연화규률：개질사암→물성협층→니회암。기우구형단원적저층질량분포모식표명，단일구형단원분포공제착저층삼수적평면전포。패주체이발육Ⅰ류、Ⅱ류저층위주，Ⅲ류저층일반발육재하구패내부협층적차당구이급패측연，Ⅳ류저층발육재석상사。
Guided by reservoir architecture theory,based on drill core and dense well logging data,learned from modern sedimentology,outcrop results,and dynamic production data,systematically study of reservoir sedimentary characteristics and delta sandstone configuration anatomy of 8 sand group of Es2 in Shenger Block was carried out, and reservoir quality distribution pattern of different configuration units was analyzed. The mainly achievements are as follows. On the analysis of complex mouth bars overlay style,in accordance with the principle of vertical subdivi-sion,lateral demarcation and flat combination,configuration of single origin sand body( single mouth bar)was iden-tified. Mouth bars of the study area can be classified into proximal mouth bar( PMB )and distant mouth bar ( DMB). Architecture patterns of single mouth bar are improved,and boundary of single mouth bar is more clearer. Interlayer distribution patterns of two kinds of single mouth bar sand body are created. Interlayers of PMB are domi-nated by clay,physical interlayer locally distributed;single mouth bar is divided into multi-proliferation body by approximately horizontal interlayers. Interlayers of DMB are dominated by physical and calcite interlayers,which are distributed mainly in the middle-up of the mouth bar,with poor continuation to the foreset. It is revealed that evo-lution of interlayer types from land to the basin are calcite sandstone interlayer,physical interlayer,and marl inter-layer. Reservoir quality distribution pattern of different configuration units indicates that single configuration unit controls reservoir parameters plane distribution. The center of mouth bar is dominated by class I and class II reser-voirs. Class III reservoir is generally distributed in the shielding area of mouth bar interlayer and bar edge,with Class IV reservoir in sand sheet.