姬塬油田低渗透浅层油藏早期开发技术政策研究

The early development technology policies of shallow low-permeability oil reservoirs in Jiyuan oilfield

姬塬油田低渗透浅层油藏开发规模逐渐加大,早期开发技术政策需优先制定,本文以H油藏为例,对低渗透浅层油藏早期技术政策进行研究制定。H油藏于2016-2018年逐步投入开发,砂体呈北西-南东向条带状发育,砂体发育较小,含油面积小。受小层注采井网不对应和注采井网不完善等问题,早期开发管理技术水平较低,不能稳定、高效开发。初期动态特征表现为初期递减逐步加大,液量、油量持续递减,开发管理水平较低。针对此问题,对H油藏开展早期管理研究,制定合理开发技术政策,提出下步治理方向,有效提高H油藏开发水平。同时为后期开发同类型油藏早期开发管理技术政策制定提供方法。

With the gradual increase in the development scale of shallow low-permeability oil reservoirs in Jiyuan oilfield,early development technology policies need to be prioritized.This paper takes the H reservoir in R area as an example to study and formulate fit-for-purpose early development technology policies for shallow low-permeability oil reservoirs.The H oil reservoir was gradually put into production from 2016 to 2018.The sand bodies present the characteristics of NW-SE banded distribution and small scale,and consequently,the oil-bearing area is relatively small.Due to the problems such as mismatching and imperfection of injection-production well pattern in small layers,early development and management technologies failed to achieve stable and efficient production,and early production performance is characterized by gradually increased decline and continuously decreased liquid volume and oil volume.In response to this problem,an early management technology research is carried out to formulate reasonable development technology policies for effectively improving the production of H oil reservoir in R area.Meanwhile,it provides a method for formulating early development and management technology policies for later development of the same type of reservoirs.