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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 被引量:11

Technical measures of deliverability enhancement for mature gas fields: A case study of Carboniferous reservoirs in Wubaiti gas field, eastern Sichuan Basin, SW China
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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。 Taking the carboniferous reservoir of Wubaiti gas field in eastern Sichuan Basin as an example, the technology strategies are proposed about the following major problems during the middle to late stage of gas field development: imbalance development, low permeability and low efficient reserves left with low producing degree, unreasonable proration caused by changes of gas well dynamic productivity, universal water production in gas wells, high reserve recovery and composite decline rate of reserve-rich region, and lack of new methods for reserves producing evaluation and remaining reserves distribution prediction. The development technical strategies for Wubaiti gas field are as follows: (1) stratigraphic subdivision and structural description in which fault and tectonic fluctuations are describe based on seismic interpretation data; (2) division and quantitative characterization of reservoir units in which the reservoir shape, scale, connectivity and gas-bearing range are evaluated according to dynamic mad static data; (3) fluid distribution and dynamic response analysis in which gas-water distribution pattern is figured out by combining structure, reservoir and gas well production dynamic characteristics; (4) reserves producing degree evaluation and deliverability review in which reserves producing degree and remaining recoverable reserves scale are evaluated from the perspective of static geological reserves and dynamic reserves, to make clear the direction of the next step production and establish rational production system in the late stage; (5) static geological model establishment and dynamic correction in which gas reservoir pressure and remaining reserve distribution are predicted by using free 3D geological modeling and numerical simulation; (6) remaining reserves prediction and classified evaluation based on the dynamic revision prediction model to guide the recovery of remaining reserves; and (7) gas production technology and equipment development, targeted gas recovery techniques are provided concerning the mature gas field.
作者 贾爱林 孟德伟 何东博 王国亭 郭建林 闫海军 郭智 JIA Ailin MENG Dewei HE Dongbo WANG Guoting GUO Jianlin YAN Haijun GUO Zhi(PetroChina Research Institute of Petroleum Exploration & Development, Beij'ing 100083, China)
出处 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2017年第4期580-589,共10页 Petroleum Exploration and Development
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)
关键词 四川盆地东部 五百梯气田 储集层描述 气田开发 剩余储量 产能挖潜 技术对策 eastern Sichuan Basin Wubaiti gas field reservoir description gas field development remaining reserves deliverabilityenhancement technical strategies
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