精细地层划分与对比在青西油田窿8区块的应用

Application of Fine Stratigraphic Classification and Correlation in No.8 Blocks in Qingxi Oilfield

精细地层划分与对比是油气田开发过程中一项重要的基础工作,地层划分的好坏直接影响油气田的开发。本次研究收集大量的地质资料基础上,结合生产动态,对青西油田窿8区块主要生油层—下沟组为研究目的,在窿8区块内以发布较稳定的K1Z底与K1G的顶为主要标志层,以K1G0中下部为辅助标志层,结合岩性特征及层序地层的沉积旋回特征,将下沟组划分为4个大层,12个小层。通过地层的精细划分与对比,形成小层地层厚度图,结合沉积相剖面图和平面图,认为窿8区块为层状油藏,在油气田后期开发过程中,应采取分层注水,达到较好的可采效果。

Fine stratigraphic division and correlation is an important basis in the process of oil-gas field development, and directly impacts on oil and gas field development. Based on the large amount of geological information, combined with production performance, the paper takes No.8 block of Qingxi Oilfield, KIZ end of and K1G top for main signs layer, K1G0 in the lower for secondary signs layer, combined rock sexual features and the layer sequence formation of deposition cycles features, and it divided Xia Groove group into 4 large layers, and 12 small layers. Through the fine classification and correlation of strata, it forms small stratigraphic thickness, combined with profiles of sedimentary facies and floor plan, think long layered reservoir in block 8, late in the oil and gas field development in the course of separate layer water injection should be taken to achieve better recovery effect.