剪切作用及剪切构造与生,储油

对湘西泸溪县白沙含油瘤状灰岩的研究发现，剪切作用不仅会使油源岩在剪切破裂过程中摩擦生热，提供有机质成熟热能，还会导致颗粒紧密排列，形成应力梯度，促使石油初次运移。剪切构造既是良好的运移通道，也可使致密岩石成为裂缝性储层。

SHEARING, SHEARING STRUCTURE AND OIL GENERATION AND ACCUMULATION

It is found from the study on the Baisha oil-bearing nodular limestone that shearing not only makes the oil source rocks generating heat by friction in the process for shear fracturing and thus providing heat energy to the maturation of organic matter, but also densifies the particles, forming a stress gradient and initiating petroleum primary migration. Shearing structures(particularly the open shearing structures) are good paths for migration and thanks to them the tight rocks can become fractured reservoirs.