叠层砂岩低渗透性油藏水平井开发储量动用程度评价

发布时间：2018-05-12 22:44

本文选题：叠层砂岩 + 低渗透性　；参考：《西安石油大学》2015年硕士论文

【摘要】：低渗油气资源在油气勘探开发中的地位越来越重要,而水平井开发低渗油气藏有直井不具备的优点,水平井与地层为线接触,泄油面积大、油井产量高、采收率高,可有效避免底水锥进等。但是目前关于水平井开发的储量动用程度评价方法仍处于早期探索阶段,急需对水平井开发储量动用程度评价的方法进行研究。叠层砂岩低渗油藏具有储层薄、储层交错叠置的突出特点,大大增加了开发难度。本论文以华庆油田白239井区长63储层作为叠层砂岩低渗透油藏的典型代表,长63为三角洲前缘水下分流河道沉积,孔隙度3.01%~19.04%、渗透率0.3~0.6m D,属于特低渗叠层砂岩油藏,在研究其地质特征的基础上,进行储层综合评价。利用三维随机建模技术、油藏工程理论和数值模拟研究,对长63不同开发方式下的储量动用程度进行评价,结果表明水平井开发储量动用程度为53.16%~58.51%;并对不同开发方式下的采收率进行预测,最终表明对于白239井区薄层交互叠置油藏的特点,水平井控制储量程度明显降低,导致水平井开发的最终采收率(8.09%)明显低于直井开发的最终采收率(11.64%)。本文对叠层砂岩低渗油藏中水平井开发具有较好的指导意义,对叠层砂岩低渗油藏的合理开发,提高储量动用程度都具有十分重要的借鉴价值和指导意义。
[Abstract]:The status of low permeability oil and gas resources is more and more important in oil and gas exploration and development, and horizontal well development of low permeability oil and gas reservoir has the advantages of line contact between horizontal well and formation, large oil discharge area, high oil production and high oil recovery. Can effectively avoid bottom water coning, etc. However, at present, the evaluation method of the exploitation degree of the horizontal well reserves is still in the early stage of exploration, so it is urgent to study the method of evaluating the exploitation degree of the horizontal well reserves. The laminated sandstone low permeability reservoir has the characteristics of thin reservoir and staggered overlay, which greatly increases the difficulty of development. In this paper, Chang63 reservoir of Bai239 well in Huaqing Oilfield is taken as a typical example of the laminated sandstone low permeability reservoir. Chang63 is a delta front underwater distributary channel sedimentation, with porosity 3.01 ~ 19.04 and permeability 0.3 ~ 0.6mD, which is an ultra-low permeability sandstone reservoir. On the basis of studying its geological characteristics, comprehensive reservoir evaluation is carried out. By using 3D stochastic modeling technology, reservoir engineering theory and numerical simulation, the reserve production degree of Chang63 is evaluated under different development modes. The results show that the production degree of horizontal well development reserves is 53.16 and 58.51, and the recovery factor under different development modes is forecasted. Finally, it is shown that the level of controlled reserves in horizontal wells is obviously reduced for the characteristics of thin layer interactive superimposed reservoirs in Bai239 well area. As a result, the final recovery factor of horizontal well is 8.09%, which is obviously lower than that of vertical well development (11.64%). This paper has good guiding significance for horizontal well development in laminated sandstone low permeability reservoir, and has very important reference value and guiding significance for rational development of laminated sandstone low permeability reservoir and improving reserve production degree.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE348

【参考文献】