【摘要】：以冀中坳陷碳酸鹽巖儲層為例,利用碳酸鹽巖微觀結(jié)構(gòu)的圖像信息,確定地應(yīng)力數(shù)值模擬計(jì)算網(wǎng)格的合適尺寸,將數(shù)字圖像處理技術(shù)引入非均質(zhì)碳酸鹽巖巖石材料細(xì)觀尺度的應(yīng)力分布計(jì)算中,將表征巖石細(xì)觀結(jié)構(gòu)特征的量與巖石物理力學(xué)參數(shù)等宏觀的量有機(jī)結(jié)合,精確預(yù)測碳酸鹽巖非均質(zhì)儲層裂縫發(fā)育及分布的區(qū)域。結(jié)果表明:研究區(qū)域最大水平主應(yīng)力為-59.51~-95.09 MPa,最小水平主應(yīng)力為-34.05~-52.58 MPa;Mises等效應(yīng)力為56.84~83.15 MPa;研究區(qū)域最大總應(yīng)變?yōu)?.097×10-4,最小總應(yīng)變?yōu)?.392×10-4;巖心樣品在左上區(qū)域和右下區(qū)域均出現(xiàn)應(yīng)力集中和變形不協(xié)調(diào)的情況,預(yù)測為裂縫主要擴(kuò)展和分布的區(qū)域;基于數(shù)字圖像處理技術(shù)能夠更真實(shí)、有效地表征儲層巖石的非均質(zhì)性。
[Abstract]:Taking carbonate reservoir in Jizhong depression as an example, the suitable size of geostress numerical simulation grid is determined by using the image information of carbonate microstructure. The digital image processing technology is introduced into the meso-scale stress distribution calculation of heterogeneous carbonate rock materials, and the amount that characterizes the meso-structure characteristics of rock is organically combined with the macroscopic quantity such as rock physical and mechanical parameters. Accurate prediction of fracture development and distribution in carbonate heterogeneous reservoirs. The results show that the maximum horizontal principal stress in the study area is-59.51 鈮，

本文編號：2523393