X-ray diffraction and petrography analysis showed that the burial depth from 2500 meters to 3000 meters was favorable to diagenetic evolution of clay and carbonate minerals in source rock.

• 粘土矿物和碳酸盐矿物的转化对烃源岩力学性质产生了影响,导致随埋藏深度的增加岩石由相对塑性向相对脆性转变。