Genetic Types of the tp12cx Strike-Slip Fault Segments and Their Role in Controlling Reservoirs in the Tarim Basin

The change of motion mode multistage active strike-slip faults controls the segmentary types faults, which is seldom studied.Based on high-precision 3D seismic data and principle structural analysis, this paper defines evolution characteristics tp12cx fault in key period identifies segmentation types. Combined with statistical results drilling production width, it demonstrated that different segments display various reservoir architecture hydrocarbon potential. experienced two phases tectonic activity controlling development: middle Caledonian late to early Hercynian. During period, a left-lateral left-step was formed. overlapping left steps were transtension zones, rest pure segments. From Hercynian, movement changed from right-lateral, arrangement remained unchanged, forming right-lateral faults. That is, as weak zone, zones all preexisting took lead moving into many maintained transtensional property. slipping process original along fault, they blocked squeezed by surrounding rocks both sides, series “positive” flower-shaped anticlines, became segments, property transpressional. Under continuous action slipping, regional right-step strike slip interiors right-step-arranged composed arranged Among them, weakly step transtensional, larger width internal stronger dissolution. deformation basically previous stage. According superposition strike-slipped overlapped changes properties, four corresponding models are divided. Type I: segment + transpressional segment; II: III: IV: segment. oil type II IV properties much than those I III properties.