Investigation of sand production and hydraulic fracturing in petroleum sandstone reservoirs

该建议涉及石油井筒现象，包括岩石退化、出砂和水力压裂。本研究通过物理和数学建模的基础研究和应用研究，对常规油藏和稠油油藏中的这些现象进行了全面的理解和量化。在石油工业中，出砂被定义为固体颗粒与油藏流体一起产生。据估计，世界上70%的石油储量位于储层砂岩中，这些砂岩在其生产寿命的某个阶段容易出砂。砂流进入井筒可以提高油井的产能/注入能力。它也有负面影响，如果大量存在，可能会导致井筒坍塌。因此，可靠的出砂预测对于优化井眼作业条件和提高油田盈利能力至关重要。只有通过改进的理论和技术来理解和捕捉各种有影响的现象，才有可能开发可靠的砂化模型。这方面是提出的研究的另一个重点，包括制定和实施可以捕捉岩石退化过程的本构法。为了避免人为条件对数值结果的影响，将对模型进行丰富。

This proposal relates to petroleum wellbore phenomena including rock degradation, sand production, and hydraulic fracturing. The proposed research takes a comprehensive approach in understanding and quantifying these phenomena in conventional and heavy oil reservoirs by fundamental and applied research through physical and mathematical modeling. Sand production in the petroleum industry is defined as the production of solid particles together with reservoir fluids. Estimates indicate 70% of the world oil reserves are in reservoir sandstones that are prone to producing sand at some time during their production life. Sand influx into the wellbore can increase the well productivity/injectivity. It also has negative aspects and, if massive, can lead to wellbore collapse. Therefore, reliable prediction of sanding, which is a focus of this proposal, is vital to optimizing wellbore operational conditions and increasing field profitability. Development of reliable sanding models is only possible if various influential phenomena are understood and captured through improved theories and techniques. This aspect is another focus of the proposed research and includes the formulation and implementation of a constitutive law that can capture the rock degradation process. The model will be enriched to avoid the effects of artificial conditions on the numerical results.