靖安油田长6油藏精细分层注水效果评价

Evaluation of finely stratified waterfiooding effect of Chang6 reservoirs in Jing＇an oiifieid

靖安油田长6油藏为特低渗透岩性油藏，开发层系多，油层厚度大，储层物性差，非均质性强。针对多层动用注水井剖面矛盾突出、水驱储量动用程度低、部分层段得不到能量补充、注水效果持续变差的问题，以精细地质研究为基础，制定精细分层注水标准，持续开展层间及层内的精细分层注水，不断优化小层开发技术政策，油藏开发形势明显好转，水驱储量动用程度得到提高，注入水突进现象得到缓解，纵向地层能量分布趋于平衡，油藏产量上升，开发水平得到显著提高。

Chang6 oil reservoirs in Jing＇an oilfield are lithologic reservoirs with extralow permeability. There are multiple series of strata for development, with large reservoir thickness, poor physical properties, and strong heterogeneity of reservoirs. Aiming at the problems such as severe contradiction of profiles in multilayered-producing water injectors, low producing degree of waterflooding reserves, leading to no energy supplement to parts of intervals, and the waterflooding effects become poor and poor, fine separated-zone water injection standard was worked out on the basis of fine geologic research. We constantly conduct the fine separated-zone water-flooding, continuously optimize the technology strategies of subzone development, thus the reservoir development situation has been significantly improved; the producing ratio of waterflooding reserves is increased; the injected water breakthrough has been alleviated; the distribution of the longitudinal energy in the formation tends to be balanced; and finally the production of reservoirs increases. The development level has been significantly improved.