深层低渗透油藏开发技术对策研究—以鸭儿峡油田白垩系油藏为例

Study on technical strategy of development for deep and low permeability oil reservoir—Taking the Cretaceous reservoir of Yaerxia oilfield as an example

鸭儿峡油田白垩系油藏产量递减快,基于对研究区地质概况分析,结合油藏生产实际,提出适用于研究区的开发技术对策。鸭儿峡白垩系油藏可采用两套开发层系,一套井网进行开发,井底流压介于7.91 MPa^10.1 MPa;平均单井日注量为45 m3~75 m3。目前平均单井理论最大日产液量为11.6 m3,平均单井理论最大日产油量为5.25 m3。建议原有油水井继续生产,Y554、Y542低产井转注,加密一口水井和油井,注采比为1:1。

The production of Cretaceous reservoir in Yaerxia oilfield is decreasing.Based on the analysis of geological situation and the actual production,and some countermeasures are proposed for the development of the area.The Cretaceous reservoir of Yaerxia can be developed with two sets of layers and one well pattern.The bottom hole flowing pressure is be-tween 7.91 MPa-10.1 MPa.The average daily water injection of single well is between 45 m^3-75 m^3.Recently,in theory, the maximum daily liquid production of single well is 11.6 m^3,and the maximum daily oil production is 5.25 m^3.The original oil and water wells are able to continue producing, reform the production well No.Y554、Y542 into water wells,encrypt one water well and one oil well,the injection-production ratio is 1：1.