高温高盐高含水油藏提高水驱采收率配套技术

针对江汉油区高温高盐高含水油藏的储层条件,应用国内外油藏精细描述、油藏工程最新理论与技术,提出了高含水油田合理钻加密井、完善注采井网、水平井挖潜、不稳定注水及高温高盐油藏采油工艺配套技术措施,形成了一套适应高温高盐高含水油藏提高水驱采收率的配套技术。     

小井距开发现河油田低渗油藏可行性研究

认为注采井网井距大,水驱控制程度差,采收率偏低是影响胜利油田现河低渗透油藏开发的关键,通过井间密度与水驱控制程度和采收率的关系等分析,提出了现河低渗透油藏开发的合理的井网密度。     

江苏复杂断块高含水单元改善水驱效果的技术对策

在分析高含水开发单元特点的基础上,针对该阶段剩余油的品位、分布和油水关系极为复杂、挖潜难度大的技术难点,提出了适合江苏复杂断块油田高含水开发单元改善水驱开发效果的思路和工作程序、技术对策,并在真武油田高含水开发单元进行了实际应用,取得了良好的效果.     

利用虚拟仪器构建的注水机组故障预测系统

大型注水机组故障预测系统由于系统复杂,采用传统的开发方式,开发周期长并且硬件系统庞大。虚拟仪器可以通过软件把计算机强大的计算处理能力和仪器硬件的测量、控制能力有机的结合起来。利用PC-DAQ与LabWindows/CVI构建大型旋转机组故障分析系统,减少了系统所需的硬件资源,加快了系统软件的开发速度,实现集成运行环境,使操作人员操作起来更加方便。     

水驱后油藏注蒸汽开发的适应性研究

热力采油技术在水驱油藏中的应用已引起国内外专家的兴趣.为确定水驱后油藏适宜转注蒸汽的油藏条件,应用油藏数值模拟方法,研究了水驱后剩余油饱和度、油层厚度、净总厚度比、油层的非均质性、原油粘度等主要油藏参数对水驱后油藏转注蒸汽开发效果的影响规律,给出了水驱油藏适宜注蒸汽开发的油藏条件.水驱后的剩余油饱和度是影响水驱油藏能否转注蒸汽开发的主要因素,当剩余油饱和度不小于0.4时,水驱后油藏可转注蒸汽开发.应用该油藏条件可对水驱后油藏能否转注蒸汽开发作粗筛选.     

Microscopic details of asphaltenes aggregation onset during waterflooding

We report detailed microscopic studies of asphaltenes aggregation onset during waterflooding of petroleum reservoirs. To achieve this objective, a series of simulations are performed on asphaltenic-oil miscibilized with water at high pressure and temperature through molecular dynamics. Results of this simulation onset are applicable to asphaltenes behavior in real crude oils. Our simulation results illustrate that the aggregation onset in waterflooding generally follows three sequential steps: (i) Asphaltene-water interaction; (ii) Water bridging; (iii) Face-to-face stacking. Then, asphaltene-water and water-water hydrogen-bonding network surround every aggregate boosting the intensity of aggregation onset. We intend to utilize such understanding of these details in our predictive and preventive measures of arterial blockage in oil reservoirs during waterflooding.     

Assisted history matching in the presence of frequent well intervention using generalize travel time inversion

In this paper we propose an efficient and novel technique that handles production discontinuities through a resampling of the production data, eliminating high frequency production details in a transformed domain. The technique also reduces non-monotonic behavior and results in a response more suitable for the GTTI based misfit calculations. Our proposed approach has been applied to an offshore turbidite reservoir with extensive well intervention resulting in highly detailed production responses. The static model contains more than three-hundred-thousand cells, complex sand depositional distribution combined with fault structures, four pairs of injector-producers, deviated producing wells and more than 8 years of production history. Previous history matching attempts using traditional approaches had difficulties matching production response at the individual well level. With our proposed modifications to the GTTI approach, a significant improvement was obtained on the well level match quality. Most importantly, by visualizing the streamlines and the dynamic adjustment of flow paths during history matching, we could easily identify the areas of inconsistency between the geologic model and the production data. The calibrated geologic model and streamline trajectories provided important insight about communication within sand channels, differences in flow paths and barriers that have not been included in the previous geologic and seismic interpretation.     

大庆油田北三区西部井网加密的实践和认识

试验区PI 1-4油层属河流-三角洲相沉积,水淹严重且极不均匀,各沉积单元水淹状况与单元的油层发育、注采完善状况紧密相连。砂体发育决定了水淹厚度具有南北条带的一致性,并且西部水淹程度比东部高,油层纵向上呈多段水淹,高中水淹部位大部分集中在各沉积单元的底部。指出试验区内有6种剩余油分布,并总结出了井网加密后对水驱的认识,为进行三元复合驱试验奠定了基础。     

海上油田水驱开发注水压力优化

渤海B油田经过长期注水开发,注水压力逐渐上升,注水量不断下降,同时,酸化解堵效果变差,有效期变短,导致油田长期欠注,地层压降大,产量递减快.在实际注水过程中,注水井近井地带会形成一定污染,造成额外的附加压降,目前执行的注水压力界限是早期注水开发时的设计值,已不能满足当前的注水需要,亟需开展注水压力优化研究.因此,引入附...     

基于多变量时间序列及向量自回归机器学习模型的水驱油藏产量预测方法

提出了一种基于多变量时间序列(MTS)及向量自回归(VAR)机器学习模型的水驱油藏产量预测方法,并进行了实例应用.该方法在井网分析的基础上通过MTS分析对注采井组数据进行优选,并将井组内不同采出井产油量及注入井注水量作为彼此相关的时间序列,通过建立VAR模型从多个时间序列中提取出相互作用规律,挖掘注采井间流量的依赖关系...