GJ油田G6断块低中渗透油藏高效开发实践

Development practice in reservoir with low-medium permeability at G6 fault block in GJ oilfield

GJ油田G6断块为一整装的低、中渗透油藏,开发初期利用油藏数值模拟技术,确定较为合理的开发政策界限,实施早期注水开发。开发过程中,针对储层特点,实施了有效的油层保护和改造措施,及时调整、细分开发层系,完善注采井网,注水开发后油藏保持着高产稳产的良好开发态势。油田开发12年中有10年采油速度保持在1.7%～2.3%,含水上升率控制在3%左右,各项开发技术指标达到或好于理论预测值。

G6 fault block in GJ oilfield is a self-contained reservoir with low-medium permeability.At the beginning of development,the numerical simulation of reservoir was used to establish the correct production limitation during early waterflooding. On the process of production,many measures such as reservoir reforming and protection have been taken to improve the reservoir according to the characteristics of the reservoir.The development layer series were subdivided,so the flooding patterns were improved.The reservoir was in a high stable production period after waterflooding.The rate of oil production has been kept at 1.7%to 2.3%for 10 years in 12 years since the oilfield was developed;and the lifting rate of water cut has been controlled in about 3 percent. All the development technique indexes reaches or surpasses the values of theory prediction.