高21块开发效果评价及有效动用研究

Research on the Effect of High 21 Development Effect and its Effective Use

高21块莲花油层属于厚层块状砂岩稠油油藏。受原油黏度大、储层渗透率低、纵向上储层非均质性强及一套井网开发等因素的影响,导致各砂体各小层储量动用程度严重不均,开发效果很差。后通过引入水平井开发技术有效地改善了区块开发效果,但由于水平井钻井投入较高,在低油价情况下基本没有经济效益。在精细地质特征研究的基础上,深入地对高21块各开发阶段开发效果评价的基础上,认为通过合理优化井网井距、生产层系及投产方式,可以有效地激发各个砂体的开发潜力,寻找到一条切实可行的油藏开发新道路,并通过现场实施效果显著。

The high 21 oil layers belong to thick sandy heavy oil reservoirs.It is affected by factors such as high viscosity of crudeoil, low permeability of reservoirs, strong heterogeneity of reservoirs and a set ofweU pattern development, which leads to the seriousunevenness of utilization of various layers of sand bodies.After the introduction of horizontal well development technology to effectivelyimprove the block development effect, but due to the high level of drilling wells into a high, in the case of low oil prices basically noeconomic benefits.On the basis of the study of fine geological characteristics, on the basis of deep evaluation of the development effectof 21 high development stages, it is considered that it is possible to effectively stimulate the development of sand bodies by reasonablyoptimizing well spacing, production layer and production mode The potential to find a viable reservoir development of new roads, andthrough the field implementation effect is remarkable.