Analyzing the Formation and Evolution of Strike-Slip Faults and Their Controlling Effects on Hydrocarbon Migration and Charging: A Case Study of Tahe Area, Tarim Basin

The Ordovician strike-slip faults system in the Tahe area of Tarim Basin provides an important opportunity for using 3D seismic data to document structural characteristics, formation, and evolution their relationship with oil gas. With high-resolution data, are interpreted, classified, described coherence technique. geometric active periods, process analyzed, between hydrocarbon accumulation charging is discussed this research project. On map, primary on east west sides relatively sheared each other, showing “X” type conjugate fault, secondary scattered. In cross-section, inserted downward into Cambrian basement up Devonian, “Single line”, “Y”, “Flower”, “Parallel lines” structures observed. Bounded by top Ordovician, deep shallow parts vertically segmented, different structure styles. switch style attributed principal stress. A “positive flower” shape was developed mid-Ordovician period under effect compressive Meanwhile, a “negative from late mid-Devonian tensile “Compound Flower” formed activities has wider fracture range, which leads fluid migration karstification. There two combinations section: “Lower single branch-upper flower type” “lower branch type”. former insertion associated homologous faults, while latter no derived faults. It impact reservoir reconstruction distribution, controlled Strike-slip not only control channel gas migration, but also horizontal vertical distribution closer carbonate more likely it form high yield area. four types models where larger scale conducive would be accumulation. Among them, model related fault higher efficiency. This contributes analyzing as well playing significant role applications exploration practical works.