Taian- Merchant Bedrock Hydrocarbon Accumulation Conditions And Model Research

By using drilling, logging, testing and analysis in the study area assay and other kinds of information, from the study of tectonic evolution, deepen the 7-day- the merchant fault bedrock hydrocarbon accumulation. Through study on tectonic evolution thought: tanlu fault from liaohe depression through the base, is divided into two. West teams in the western sag of taian today- the merchant fault location and its north extension through the west side of damintun sag, and concluded that the early cretaceous sinistral strike-slip movement of the early reform played an important role on the basement of reservoir; Late early cretaceous strike-slip movement stretching into the central uplift in producing a series of slip fault block, and the central uplift in middle and western sag formed the weak tectonic belt, for the development and evolution of the Cenozoic merchant fault laid a foundation. Taian merchant fault, phased development for a long time, make the bedrock reservoirs formed many sets of reservoir and caprock system; Second, "laying on store", migration and accumulation patterns of the "" and other complex reservoir and cover configuration system; Thirdly, because the 7-day merchant has broken away from big fault, and the intersection of the former in nearly east-west fault characteristic more area, directly or indirectly affect the growth of the bedrock fissure reservoir; Fourthly, taian merchant fault in three sedimentary period activity, dongying period most violent activity, its activity intensity and time in accordance with the source sub-sag, major period of hydrocarbon expulsion. Study suggests: the central bulge of the buried hill reservoir main controlling factors for the cap rock condition and insider fracture development degree, and xinglong fluid accumulation of main controlling factors for insider fracture development degree; In the paleogene system under the premise of caprock is superior, similar in fracture development degree is higher, the better the connectivity, the more beneficial to oil and gas enrichment, is not conducive to insider reservoir formation; Concluded that local structural highs on the surface of the basal surface of unconformity and bedrock insider fracture endpoint, inflection point, intersection may be the bedrock of hydrocarbon accumulation area. On the basis of the study and understanding, in 2010, the deployment of the ancient 7 and zhao zhao 8 two exploration Wells, try 3 mouth, oil Wells are successful, the horse ancient 9 and 12 ancient Wells did to get a high yield, xinglong xinglong station report buried hill zone as a whole has proven reserves of 1.27 x 108 t.