致密砂砾岩油藏开发中地质工程一体化实践与思考

准噶尔盆地环玛湖地区致密砂砾岩是中国陆地的重要油气富集地,但开发中面临着地质条件复杂、工程难度大、成本高等挑战。以环玛湖地区玛2井区百口泉组油藏为例,运用地质工程一体化思想对该区致密砂砾岩油藏开发进行集中攻关。研究表明:优质储层是提高单井品质的地质基础;优质油层钻遇率是影响水平井产量的关键因素,而精细三维地质模型指导下的地质导向钻井可有效提高钻遇率;区块适应于"大段多簇+暂堵+极限射流"组合压裂工艺,采用水平井+体积压裂的思路,可使该区复杂致密油得到效益开发。经过攻关,该区新开发井的储层品质、钻井品质和压裂品质均取得了明显提升,实现了致密砂砾岩油藏效益开发的初步突破,同时对环玛湖地区致密砂砾岩油藏的开发具有指导意义。

Practice and consideration of geo-engineering integration in development of tight glutenite reservoir

The Huanmahu area of Junggar Basin is an important land of oil and gas accumulation in China,but its development is confronted with complicated geological conditions、high engineering difficulty、high cost and high challenge.Taking the Baikouquan formation reservoir in Ma2 well area of Huanmahu area as an example,this paper deals with the development of tight glutenite reservoir in this area with the integrated thought of geological engineering.The results show that high quality reservoir is the geological basis for improving the quality of single well;The drilling rate of high quality reservoir is the key factor affecting the horizontal well production,and the geological-guided drilling under the guidance of fine three-dimensional geological model can effectively improve the drilling encounter rate;The block is suitable for large-section multi-cluster+temporary plugging+limit jet combined fracturing,The idea of horizontal well+volume fracturing can make the complex tight oil in this area get benefit development.After overcoming the key problems,the reservoir quality、drilling quality and fracturing quality of the newly developed Wells in this area have been significantly improved,which has achieved a preliminary breakthrough in the benefit development of tight glutenite reservoir,and has guiding significance for the development of tight glutenite reservoir in The Huanmahu area.