Compressive analysis of deep rock in a block of Qinghai Oilfield
Compressibility evaluation of oilfield formation is the key problem in hydraulic fracturing and is directly related to the final production increase.In this paper,the compres-sibility evaluation on the deep rock in one block of Qinghai Oilfield was carried out.Brittle-ness index was characterizated quantitatively through defining the crack description index and combining it with two calculation methods of rock mechanics parameters and residual stress.Plasticity index was also characterizated quantitatively through two calculation methods of plastic strain energy and rock mechanics parameters.Based on the above two factors,calcu-lation formula of compressibility index was obtained in the premise of mutual verification with brittleness index and plasticity index,and the calculation results of 7 groups of test cores were used to put forward some suggestions to the hydraulic fracturing of target oilfield block.
万方数据
维普
