产品展厅>>项目研发>>裂缝-孔洞型碳酸盐岩储层试气设计技术研究

2013年部署在塔里木盆地塔中北坡顺南地区的顺南4、顺南5井取得重大突破,因此对西北油田分公司的气藏开发水平提出了新要求。以雅克拉气田为代表,以往的试气技术研究集中在碎屑岩藏的产能计算、由于反凝析现象造成的储层分带性认识等方面。本项目对碳酸盐岩气藏的试气设计进行深入研究,形成一套针对裂缝-孔洞型的试气设计方法,包括缝-洞型干气藏产量预测方法,试气生产制度优化设计和地面流程优化设计。

缝-洞型干气藏产量预测方法研究:井口压力折算方法研究。井无计量时产量估算。绝对无阻流量的估算。生产压差计算。

试气生产制度优化设计研究:最小临界携液产量预测。最大冲蚀产量计算。工作制度(油嘴)设计。

地面流程优化设计:节流后温度计算方法研究。水合物预测方法。防止水合物生成回压控制技术研究。

碳酸盐岩储层试气设计技术应用。

目前对碳酸盐岩气藏的试气设计方法国内外暂时没有深入研究。项目研究成果及技术政策适用于整个碳酸盐岩缝洞型油藏,针对碳酸岩气藏的地质特征和储层特点,找出制约气井生产的因素,优化采气工艺方式及采收率,编制配套的钻井、完井、增产措施、工作制度、采气工艺方案,对于气井的产能预测和保证生产,具有重要的指导意义。产品实现了气井工作制度设计一键化操作,为试气设计提供依据,可形成提高采收率的主导技术,实现油藏的高效开发,具有很高的推广价值。

Products>>Project Development>>Study on Gas Test Design Technology of fracture-hole carbonate Reservoir

In 2013, Shunnan 4 and Shunnan 5 wells, which were deployed in Shunnan area, Tazhong North Slope, Tarim Basin, made a major breakthrough, so new requirements were put forward for the gas reservoir development level of Northwest Oilfield Branch Company. Based on the Yakera gas field, the previous research on gas test technology has focused on the productivity calculation of clastic reservoir and the understanding of reservoir zonation caused by reverse condensate phenomenon, In this project, the gas test design of carbonate gas reservoir is deeply studied, and a set of gas test design methods for fracture-hole type are formed, including the production prediction method of fracture-hole dry gas reservoir, the optimization design of gas test production system and the optimization design of surface process.

Study on production prediction method of fracture-hole dry gas reservoir: research on wellhead pressure conversion method. Production estimation when there is no measurement in a well. Estimation of absolute open flow capacity. Calculation of production pressure difference.

Study on optimal design of gas test production system: minimum critical liquid carrying output prediction. Calculation of maximum erosion yield. Work system (nozzle) design.

Ground process optimization design: research on temperature calculation method after throttling. Hydrate prediction method. Research on back pressure control technology to prevent hydrate formation.

Application of gas test design technology in carbonate reservoir.

At present, there is no in-depth study on the gas test design method of carbonate gas reservoir domestic and abroad. The research results and technical policies of the project are suitable for the whole carbonate fracture-hole reservoir. According to the geological characteristics and reservoir characteristics of carbonate gas reservoir, the factors restricting gas well production are found out, the gas recovery technology mode and recovery factor are optimized, and the matching drilling, well completion, production increase method, working system and gas production scheme are of great guiding significance for gas well productivity prediction and production guarantee. The product realizes the one-key operation of gas well working system design, provides the basis for gas test design, forms the leading technology to improve oil recovery, and realizes the efficient development of reservoir, which has high popularization value.