开发中后期气田产能挖潜技术对策——以四川盆地东部五百梯气田石炭系气藏为例

发布时间：2018-11-03 09:54

【摘要】：以四川盆地东部五百梯气田为例,针对开发中后期气田面临的开发不均衡、低渗低效储量多且动用程度低、气井动态产能变化导致配产不合理、气井普遍产水、富集区采出程度高且综合递减率高及缺少新的储量动用评价和剩余储量分布预测方法等主要问题,提出五百梯气田开发后期技术对策。技术对策主要有:(1)地层划分与构造描述,依据地震解释资料精细刻画断层及构造起伏变化;(2)储渗单元划分和定量表征,动、静态结合评价储渗体形态、尺度、连通性及含气规模;(3)流体分布及动态响应分析,综合构造、储集层及气井生产动态特征,分析确定气藏气水分布规律;(4)储量动用程度评价与产能复核,从静态地质储量和动态储量角度评价气藏储量动用情况及剩余可动储量规模,明确下一步动用方向,校正气井产能,指导气井开发后期合理生产制度的确定;(5)静态地质模型建立及动态修正,利用精细三维地质建模和数值模拟手段预测气藏压力及剩余储量分布特征;(6)剩余储量预测及分类评价,结合动态修正后的预测模型,开展剩余储量分类评价,指导产能挖潜部署;(7)采气工艺技术及工具研发,针对开发中后期气田的现状,提出针对性的采气工艺技术并研发了配套工具。
[Abstract]:Taking the Yuti gas field in the eastern part of Sichuan Basin as an example, aiming at the unbalanced development of the gas field in the middle and late stage of development, the low permeability and low efficiency reserves and the low production degree, the dynamic productivity change of gas wells leads to unreasonable production distribution and universal water production of gas wells. The main problems such as high recovery degree and high comprehensive decline rate in rich areas and lack of new methods of reserve production evaluation and prediction of remaining reserves distribution are discussed. The technical countermeasures in the later stage of development of 500 gas field are put forward. The main technical countermeasures are as follows: (1) stratigraphic division and structural description, fine description of faults and structural fluctuations according to seismic interpretation data; (2) compartmentalization and quantitative characterization of the storage and seepage units, dynamic and static evaluation of the shape, scale, connectivity and gas-bearing scale of the reservoir and permeability; (3) Analysis of fluid distribution and dynamic response, synthesis of structure, reservoir and gas well production dynamic characteristics, analysis and determination of gas and water distribution law of gas reservoir; (4) evaluation of reserve production degree and productivity review, evaluation of gas reservoir reserve production and remaining movable reserve scale from static geological reserves and dynamic reserves, determination of the next production direction, and correction of gas well productivity. To guide the determination of reasonable production system in the later stage of gas well development; (5) the static geological model is established and the dynamic modification is carried out, and the pressure and remaining reserves distribution characteristics of the gas reservoir are predicted by means of fine three-dimensional geological modeling and numerical simulation. (6) forecast and classification evaluation of residual reserves, combined with dynamic modified prediction model, to carry out classification evaluation of remaining reserves to guide the deployment of potential production capacity; (7) Research and development of gas production technology and tools. Aiming at the present situation of gas field development in the middle and late stage, the paper puts forward the pertinent gas production technology and develops the matching tools.
【作者单位】：中国石油勘探开发研究院;
【基金】：“十三五”国家科技重大专项“复杂天然气藏开发关键技术”(2016ZX05015)
【分类号】：TE37

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