Since most of the conventional oil and gas resources have been intensively investigated, unconventional oil and gas resources such as deep marine carbonate reservoirs and heavy oil reservoirs have become the primary focus in the exploration and development of oil and gas. The oil and gas reservoirs with complex fracture geometries account for nearly 45% of the global oil and gas reserves, and the production of such complex fractured oil and gas reservoirs accounts for nearly 60% of the total natural gas production. Consequently, fractured oil and gas reservoirs have received considerable research attention in recent years. Further, fractures determine the permeability and productivity of petroliferous reservoirs. In this paper, we have investigated the current status of research on petroliferous rock under the action of acid etching. At the same time, we have summarized the existing rock fracture propagation criterion and crack propagation criterion theory, and selected the most common crack propagation criterion for setting simulation parameters. Subsequently, the Brazilian split test and the rock acidification sensitivity experiment are combined, and the comparative experiment method is used to obtain the hydrochloric acid concentration and acidification treatment time that can meet the DIC optical test. Through the DIC method, the expansion of rock cracks from the moment of loading of experimental species to the moment when the completion of splitting is recorded, the strain and displacement of each point on the rock surface during the Brazilian splitting test are obtained. Finally, through the ABAQUS software, different fracture propagation criteria are used to simulate the fracture propagation process in the rock samples in the Brazilian fracturing test, and the results are recorded. Then, the expansion model is selected that best fits the carbonate fracture before and after acid etching. The in-situ stress field of the fault zone in the Shunbei area is exceedingly complex. Based on the Shunbei area, the model is set up. Furthermore, the features of plane geomechanics are studied, and the fracture propagation laws of acid salt reaction are analyzed. The results provide the basis for optimizing the acid fracturing technology and construction parameters in the Shunbei area.

由于已经对大多数常规油气资源进行了深入研究，因此，非常规油气资源，如深海碳酸盐岩储层和重质油藏，已成为油气勘探开发的主要重点。具有复杂裂缝几何形状的油气藏约占全球油气储量的45％，此类复杂裂缝油气藏的产量约占天然气总产量的60％。因此，近年来，裂缝性的油气藏受到了相当大的研究关注。此外，裂缝决定了含油储层的渗透率和生产率。本文研究了酸蚀作用下含油岩石的研究现状。同时，我们总结了现有的岩石裂缝扩展准则和裂缝扩展准则理论，并选择了最常用的裂缝扩展准则来设置模拟参数。随后，将巴西劈裂试验和岩石酸化敏感性试验相结合，并采用比较实验方法获得了可以满足DIC光学试验的盐酸浓度和酸化处理时间。通过DIC法，从实验物种的加载时刻到记录分裂完成的时刻之间的岩石裂缝扩展，获得了巴西分裂试验期间岩石表面各点的应变和位移。最后，通过ABAQUS软件，在巴西压裂试验中，使用不同的裂缝扩展标准模拟岩石样品中的裂缝扩展过程，并记录结果。然后，选择最适合酸蚀之前和之后碳酸盐岩裂缝的膨胀模型。顺北地区断裂带的地应力场极其复杂。基于顺北地区，建立模型。此外，研究了平面地质力学的特征，并分析了酸性盐反应的裂缝扩展规律。研究结果为优化顺北地区酸压技术和施工参数提供了依据。选择的膨胀模型最适合酸蚀之前和之后的碳酸盐岩裂缝。顺北地区断裂带的地应力场极其复杂。基于顺北地区，建立模型。此外，研究了平面地质力学的特征，并分析了酸性盐反应的裂缝扩展规律。研究结果为优化顺北地区酸压技术和施工参数提供了依据。选择的膨胀模型最适合酸蚀之前和之后的碳酸盐岩裂缝。顺北地区断裂带的地应力场极其复杂。基于顺北地区，建立模型。此外，研究了平面地质力学的特征，并分析了酸性盐反应的裂缝扩展规律。研究结果为优化顺北地区酸压技术和施工参数提供了依据。