超前调剖技术在南华201区块探索与应用

Exploration and Application of Early Profile Control in NH 201

南华201阜三段油藏是典型的滩坝砂高孔高渗油藏,目前处于开发早期,储层非均质性强,注水后,各小层储量动用不均、平面注采矛盾较为突出。数值模拟结果表明,区块在2019年5月见水并进入含水上升期。为改善层间及平面矛盾,优选南华2-16、南华2-31井进行超前调剖试验,取得较好效果,在此基础上推广至区块其余6口水井。8口注水井整体调剖后注入压力上升,吸水剖面得到明显改善,面积井网流线启动率由35.5%提高到64.5%。截至2020年5月,日产油水平稳定在232 t,综合含水控制在18%,明显低于数值模拟预测值,控水稳油效果显著,为整装非均质油藏稳产开发提供了新思路。

NH201 block is a tipical beach-bar sand reservoir with high porosity and permeability.Now,it is in early development stage.After waterflooding,plane and interlayer reserves are uneven producted.The numerical simulation result shows that water will break through in may 2019 and then the water cut will rise very quickly.To solve this problem,we select NH2-16 and NH2-31 for early profile control test.On this basis,it is extended to the remaining 6 wells in the block.after profile control of 8 water injection wells,the injection pressure rose and intake profiles obtained obviously improved.The streamline start-up rate increased from 35.5%to 64.5%.to may 2020,the daily oil production level is stable at 232 t and the comprehensive water cut is controlled at 18%,which is obviously lower than the predicted value of numerical simulation.Early profile control has remarkable effect of water control and oil stabilization which provides a new idea for stable production and development of integrated heterogeneous reservoirs.