渤海海域变质岩潜山油藏稀井网高效开发技术

发布时间：2018-09-11 08:19

【摘要】：为了实现渤海海域变质岩潜山油藏少井高产开发目标,以JZ251S油田为例,开展储集层裂缝精细描述、双重介质油藏水驱油机理表征、新型井网模式优选、合理开发技术政策制定及稳油控水技术等方面研究,形成变质岩油藏稀井网高效开发关键技术。根据JZ251S潜山油藏特点,开展裂缝各向异性波动方程的正演模拟,验证了窄方位角地震资料对工区裂缝检测的有效性。应用叠前多参数反演和地应力场模拟分别预测了裂缝性储集层的发育部位和裂缝发育方向。基于大尺度三维物理模型及数值模拟,提出了水平井顶底交错立体注采井网新模式;结合开发需求,提出JZ251S油藏合理采油速度控制在3%~4%,油田初期可实施衰竭开发至地层压力水平保持在70%原始地层压力,再进行注水保压开发。结合工区内试采生产资料,模拟了水平井不同的见水模式并形成4种诊断图版,有效指导油田稳油控水措施实施。JZ251S潜山油藏现场实践表明,采用该系列技术,可大幅增加原油产量,提高注水开发效果。
[Abstract]:In order to achieve the goal of developing small wells and high yields in metamorphic buried hill reservoirs in Bohai Sea area, taking JZ251S oilfield as an example, fine description of reservoir fractures, characterization of water flooding mechanism of dual medium reservoirs, and optimization of new well pattern are carried out. The key technologies for the development of dilute well pattern in metamorphic reservoir are studied in the aspects of rational development technology policy and oil stabilization and water control technology. According to the characteristics of JZ251S buried hill reservoir, the forward modeling of anisotropic wave equation of fracture is carried out, which verifies the validity of narrow azimuth seismic data for fracture detection in working area. The prestack multi-parameter inversion and in-situ stress field simulation are used to predict the development position and direction of fractured reservoir respectively. Based on the large scale three-dimensional physical model and numerical simulation, a new model of horizontal well top and bottom staggered three-dimensional injection-production pattern is proposed, which combines the development requirements, It is suggested that the reasonable oil recovery rate of JZ251S reservoir should be controlled at 3% and 4%, and the initial stage of the oilfield could be developed from failure to 70% original formation pressure, and then water injection and pressure preservation could be carried out. Combined with the production data of production test in the working area, different water seeing models of horizontal wells are simulated and four kinds of diagnostic charts are formed, which effectively guide the oil field water control measures to carry out the field practice of .JZ251S buried hill reservoir, which shows that the series technology is adopted. Can increase crude oil production substantially, improve water injection development effect.
【作者单位】：中国海洋石油国际有限公司;中海石油(中国)有限公司天津分公司;
【基金】：中国海洋石油总公司“十二五”重点科技攻关项目(CNOOC-KJ125ZDXM06LTD-02)
【分类号】：TE53

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