垦西油田垦622井区岩性油藏开发技术研究

胜利油区作坳陷典型的复式油气区，油气资源丰富，油藏类型多，经过多年的精查细找，目前的勘探目标已由构造油气藏逐渐向复杂岩性油气藏转移，但岩性油气藏地质条件极其复杂，制约其开发的因素较构油藏多，开发难度较大，在垦西油田垦622井区岩性油茂开发方案的编制过程中，充分应用波阻抗反演等新技术追踪描述砂体，借助现代试井手段研究油藏的特征，利用数值模拟技术进行机理研究和方案优选，这套技术在现场应用后，取得了理相效果，并为今后同类岩性油气藏的开发提供了有益参考。

A research for the development technology of lithologic oil reservoir in Wellblock Ken-622 of Kenxi oil feild

The central Es3 oil reservoir in Wellblock Ken-622, Kenxi Slope area, is a lithologico- structural composite reservoir that is rather complicated in geologic conditions, which is much difficult to be exploited for many factors constrained. In order to exploit it rationally and reasonably, the authors take advantages of the technology of wave impedance inversion, modern method of well testing and numerical simulation to trace and describe sandbody, reason out the characteristics of oil reservoir and perform research of economic and reasonable well pattern arrangement, suitable maintaining level of formation pressure, selection of water injection and optimization of initial oil production rate etc. The technology the authors mentioned in this paper would help the engineers to make scientific policy decision in development program design. After this method being carried out in practical field trial, there appear somewhat perfect effects-each development well of total 8 reaches its design requirement without exception, and compared with the predictive thickness of sandbody, the average thickness error would be 6%. Remarkable economic benefit has been achieved since this development program was put into effect one year ago, the real production results very much tallies with that from research, now the daily oil production of the wellblock has been reached 255t/d, which shows that it can be considered as a reference for developing similar lithologic oil reservoirs.