S26气藏开采方案优选研究

我国已探明天然气储层大多属于中低渗透储层,这些储层非均质明显,孔隙度低,连通性差,自然产能低。为了高效开采气藏,必须结合储层的物性特征,优选井网形式和采气速率,制定合理的开发方案。本文主要通过数值模拟运算,研究井网形式、采气管径、采气速率等开发因素对S26区块气藏开采效果的影响,从而优选出合理的开采方案。     

环状管网井口回压案例分析

油田环状集输系统,常常由于受到管道变形、堵塞、结蜡、掺水量、水垢及随着集输长度的增加而出现胶凝状态等多方面因素的影响,导致部分井口回压过高而停井,影响了油田生产。针对油田现场中出现的问题管路,利用节点压力-温度诊断法确定了环路掺水走向,在此基础上,利用纯水百米压降诊断法及混输流动特性诊断法分别判断环路管网是否存在堵塞及管道规格与运行工况是否匹配,综合全面分析环路管网井口回压过高原因。     

钻井液的化学性能对井壁稳定性的影响研究

由于井壁垮塌、缩颈和地层破裂等井壁失稳现象所造成的卡钻憋钻、井漏井喷和钻井液大量漏失等问题会延误油气资源勘探和开发的速度,还会为石油行业带来巨大的经济损失。钻井液的化学性能会影响井壁稳定性。针对井壁失稳的类型,从钻井液所含化学物质的种类及含量,钻井液化学势,钻井液pH值三方面的化学性能对井壁稳定性的影响机理进行了研究和分析,对于解决井壁失稳问题、减少经济损失具有实际的指导意义。     

井下电机车直流供电系统的技术改造

阐述了老矿山井下电机车直流供电系统的诸多弊病。及采取大容量整流设备、放射式集中供电的技改措施和取得的良好效果。     

水井套损部位可洗井封堵工具的研制

目前油田套损注水井使用常规小直封隔器无法实现反洗井、使用可洗井封隔器反洗井时不能有效封堵套损点,为此研制了注水井套损部位可洗井封堵工具,实现可反洗井和对套损点的有效封堵。该封堵工具在注水井套损补贴管处使用上、下两个可洗井封堵工具,采用大、小两组胶筒的结构设计,内设洗井通道,反洗井时能够保证对套损点的有效封堵。     

川西岩性气藏实时井位部署系统研究

川西地区侏罗系岩性气藏是目前最主要的勘探开发领域,高精度三维地震勘探是支撑岩性气藏井位部署的关键技术,实时的将地震资料与地面地质条件结合建立探井实施部署系统是勘探工作者长期追求的目标。通过对川西地区侏罗系岩性气藏井位部署方法的长期研究,认为建立地震与地形地物基础数据库、地震资料精细解释与实时应用、GPS的有效应用是高效井位部署的关键技术。研究成果支撑了川西地区探井的部署,对于其他地区的高效井位部署具有重要的参考价值。     

单2-支平8井优快钻井技术研究

单2-支平8井是胜利油田第一口大斜度垂向分支水平井,分支井眼的最大井斜达116度,通过优化钻井参数、井眼轨迹以及分支点窗口形态等配套技术使得该井在短短8天的时间内完钻,这对于大斜度分支水平井钻井有一定的指导和借鉴意义。     

交互式试井系统在油气井测试工艺中的探讨研究

对海上油田探井测试工艺中交互式试井系统进行了综合研究和分析,尤其是对该系统的构成、基本原理和作业优势进行了详细阐述。现场作业的实践也证明了该交互式试井系统能充分提高地层压力和温度的录取、提高作业时效和节约作业成本,其具有很大的推广价值和应用价值。     

Comparison of interwell connectivity predictions using percolation, geometrical, and Monte Carlo models

Reservoir connectivity is often an important consideration for reservoir management. For example, connectivity controls waterflood sweep efficiency and it affects decisions concerning well placement and spacing. The uncertainty of sandbody distributions, however, can make interwell connectivity prediction extremely difficult. Percolation models are a useful tool to simulate sandbody connectivity behavior to estimate interwell connectivity.This study applies a percolation method to estimate interwell connectivity. Using results derived by Andrade, King, and others for fluid travel time between locations in a percolation model, we develop a method to estimate interwell connectivity. Four parameters are needed to use this approach: the net-to-gross ratio p_sand, the typical sandbody size, reservoir length and well spacing. To evaluate this new percolation method, the results are compared to results from geometrical models, Monte Carlo, and reservoir simulation.These methods were applied to estimate interwell connectivity for three non-communicating stratigraphic intervals in Monument Butte oil field, Utah. The results suggest that the percolation method can estimate the probability of interwell connectivity reliably for thin intervals for any values of p_sand, well spacing, and reservoir length. The geometrical model also performs well, but can only be applied in fields where the well spacing is less than one-half of the sandbody size.The proposed method requires that the reservoir interval for evaluation be sufficiently thin so that 2D percolation results can be applied. For thick intervals or heterogeneous sandbody distributions, the percolation method developed here is not suitable because it assumes thin layers. Future percolation research will be needed to adapt this new method to 3D cases.     

Does office space occupation matter? The role of the number of persons per enclosed office space,psychosocial work characteristics,and environmental satisfaction in the physical and mental health of employees

The study examined the effects of office space occupation, psychosocial work characteristics, and environmental satisfaction on physical and mental health of office workers in small‐sized and open‐plan offices as well as possible underlying mechanisms. Office space occupation was characterized as number of persons per one enclosed office space. A total of 207 office employees with similar jobs in offices with different space occupation were surveyed regarding their work situation (psychosocial work characteristics, satisfaction with privacy, acoustics, and control) and health (psychosomatic complaints, irritation, mental well‐being, and work ability). Binary logistic and linear regression analyses as well as bootstrapped mediation analyses were used to determine associations and underlying mechanisms. Employee health was significantly associated with all work characteristics. Psychosocial work stressors had the strongest relation to physical and mental health (OR range: 1.66–3.72). The effect of office space occupation on employee health was mediated by stressors and environmental satisfaction, but not by psychosocial work resources. As assumed by sociotechnical approaches, a higher number of persons per enclosed office space was associated with adverse health effects. However, the strongest associations were found with psychosocial work stressors. When revising office design, a holistic approach to work (re)design is needed.