产品展厅>>项目研发>>凝析油气藏试气井筒节点分析与试井评价技术研究

天然气开采历经地层渗流-井筒管流-地面流动,同时天然气组份及含水各不相同,全过程是一个复杂系统工程。试气设计适用于天然气开采行业工程师工程设计以及生产管理工作者日常生产分析计算使用。凝析油气藏在勘探开发中,需要通过试气研究,得到试气最优方案,并对凝析油气藏进行试井分析,得到储层参数,最后对凝析油气藏进行产能评价,从而形成一套凝析油气藏试气完整的分析系统,从而能够了解实际生产情况,掌握各种生产参数对生产的影响,为优化各项生产参数提供依据,方便管理,并能够预测未来生产趋势,指导生产措施。

凝析油气井井筒节点分析制方法及系统研究。

地层井筒耦合流动下的节点理论研究:包括油、气和水高压物性参数研究、凝析气井相图计算理论研究、井筒凝析下的气液两相垂直管流理论、凝析气井计算IPR曲线方法研究(气相)、凝析气井计算OPR曲线方法研究、凝析气携液量计算、冲蚀流量计算、气井水合物预测、气井井筒温度及压力分布计算、气井通过油嘴节流计算、气井通过临界流量计算。

凝析油气藏试井分析及产能评价方法研究和系统研制。

凝析气渗流理论、IPR产能评价及试井理论研究,内容如下:凝析气数学模型的建立、考虑凝析效应定义拟压力、无量纲参数无量纲方程及边界条件、无量纲方程求解方法研究、无量纲图版分析、凝析气试井分析方法研究、地层产能计算方法研究、凝析油气藏数理模型建立(油藏模型、地质模型、井筒模型、外边界模型)。

计算方法以及技术的软件开发框架设计。

软件开发方面涉及到复杂计算(地层、井筒及节流阀等)、复杂数据(流体、地层及井参数等)、软件的数据流、软件的数据体系、软件功能优化、报告输出等多个模块。

基于XML的软件内部数据管理;软件计算所需要的物理量;软件的格式化输出;软件的核心功能算法函数;软件的界面及输出相关算法;软件的图形显示及打印框架;软件输出系统部分框架。

目前凝析油气藏的试气设计方法国内外暂时没有深入研究。通过试气分析,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。产品实现了储层分析、气井工作制度设计和产能评价的一套流程,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,具有很强的竞争优势。

Products>>Project Development>>Study On Condensate Oil and Gas Reservoir gas test wellbore Node Analysis and well testing Evaluation Technology

Natural gas exploitation go through formation seepage, wellbore flow and surface flow, at the same time, the composition and water cut of natural gas are different, and the whole process is a complex system engineering. Gas test design is suitable for engineering design of natural gas mining industry engineers and daily production analysis and calculation of engineers. In the exploration and development of condensate oil and gas reservoirs, it is necessary to obtain the optimal scheme of gas test through gas test research, and to carry out well testing analysis of condensate oil and gas reservoirs to obtain reservoir parameters, and finally to evaluate the productivity of condensate reservoirs, so as to form a complete gas test analysis system for condensate reservoirs, so that we can understand the actual production situation and the influence of various parameters on production, provide the basis for optimizing various production parameters, make management convenience, predict the future production trend and guide production measures.

Research on the method and system of wellbore nodal analysis for condensate oil and gas wells

Node theory under wellbore coupling flow including: the study of high pressure physical parameters of oil, gas and water, the calculation theory of phase diagram of condensate gas well, the theory of gas-liquid two-phase vertical pipe flow under wellbore condensate, the method of calculating IPR curve of condensate gas well (gas phase), the method of calculating OPR curve of condensate gas well, the calculation of condensate gas liquid capacity, the calculation of erosion flow rate and the prediction of gas well hydrate. Gas well wellbore temperature and pressure distribution calculation, gas well through nozzle throttling calculation, gas well through critical flow calculation.

Research and system development of well testing analysis and productivity evaluation method for condensate reservoir

Condensate gas seepage theory, IPR productivity evaluation and well testing theory research, the contents are as follows: the establishment of condensate gas mathematical model, considering condensate effect definition of pseudo-pressure, dimensionless parameters/equations and boundary conditions, dimensionless equation solution method, dimensionless plot analysis, condensate gas well testing analysis method, formation productivity calculation method, condensate reservoir mathematical model build (reservoir model, geological model, Wellbore model, outer boundary model).

The software development framework design of calculation method and technology. The main contents are as follows:

Software development involves complex calculation (formation, wellbore and throttle valve, etc.), complex data (fluid, formation and well parameters, etc.), software data flow, software data system, software function optimization, output results and so on.

the internal data management of the software based on XML; the parameters needed for software calculation; the formatted output of the software; the core functional algorithm function of the software; the interface of the software and the related algorithm of the output; the graphic display and printing framework of the software; and the partial framework of the software output system.

At present, the gas test design method of condensate reservoir has not been developed deeply domestic and abroad. Through gas test analysis, it is of great guiding significance for gas well productivity prediction and production guarantee to find out the factors restricting gas well production, optimize gas production process mode and recovery factor, compile matching drilling, completion, production increase measure, working system and gas production process scheme. The product realizes a set of processes of reservoir analysis, gas well working system design and productivity evaluation, which provides the basis for gas test design, forms the leading technology to improve oil recovery, realizes the efficient development of reservoir, and has a strong competitive advantage.