低渗-致密砂岩气藏开发中后期精细调整技术

Technologies for Fine Adjustment in the Middle-later Development Stage of Low Permeability Tight Sandstone Gas Reservoirs

付宁海 唐海发 刘群明

FU Ninghai TANG Haifa LIU Qunming

中国石油勘探开发研究院, 北京 海淀 100083

PetroChina Research Institute of Petroleum Exploration & Development, Haidian, Beijing 100083, China

低渗-致密砂岩气藏进入开发中后期，面临如何进一步提高储量动用程度与采收率问题，开展开发中后期精细调整是改善其开发效果的重要技术手段。针对该类气藏进入开发中后期地质、生产动态以及开发方式上相对于开发早期的变化，梳理了开发中后期在剩余储量描述、提高储量动用程度和井网适应性评价中面临的关键技术问题，围绕气田挖潜与提高采收率，有针对性地提出了技术对策，提出了以开发中后期精细气藏描述、储量动用程度评价和井网井距优化为核心的气藏开发中后期精细调整的技术思路及流程。以C气田为例，采用该技术方法进行了气田中后期的开发调整，解决了剩余储量的有效动用问题，整体提升了气田开发效果和经济效益。

The low permeability tight sandstone gas reservoirs face the problems of how to further increase the producing degree of reserves and improve the recovery efficiency in the middle-later stage of development. Fine adjustment is an important technical means to improve the development effect. The critical technical challenges in the middle-later stage of development of this type of gas reservoir, such as the remaining reserves description, improving reserves producing degree, and well pattern adaptability evaluation, were analyzed in light of the difference between the middle-later and early stages of development in geology, production performance, and development scheme. Technical solutions were then proposed for the challenges, focusing on potential tapping and improving the recovery of the gas fields. Technical ideas and processes for fine adjustment in the middle-later stage of gas reservoir development were also proposed, based on fine gas reservoir description in the middlelater stage of development, reserves producing degree evaluation, and well spacing optimization. By taking C Gas Field as an example, this technique successfully applied in its middle-later stage of development adjustment, increased the remaining reserves producing degree and overall improved the gas field's development effect and economic benefits.

10.11885/j.issn.1674-5086.2017.09.15.01