Study on the controlling effect of Nanpu No. 2 Fault growth connection on buried hill evolution

^1. Northeast Petroleum University Geoscience Institute, Daqing 163318, Heilongjiang Province, China
^2. Research Institute of Exploration and Development, Jidong Oilfield Company, Petrochina, Baoding 063000, China

Abstract

Nanpu fault 2 has an important control action of buried hill, in order to study the growth of Nanpu fault 2 connection process and Nanpu no. 2 the control function of buried hill through the application of slip - distance curve and slip back stripping method to study the growth of the Nanpu fault 2 connection process, and the use of equilibrium profile to analyze its effect on the tectonic evolution of the buried hill. The results show that the Nanpu No. 2 fault is characterized by segmentalized growth, caledonian quiet structure, and widely distributed carbonate deposits. After the middle-late Caledonian uplift, the strata suffered from denudation. Strong folding occurred in The Indochinese period, and in the Himalayan Period, the Nanpu no. 2 fault was weakly active in the Shahejie sedimentary period and developed only in the north, forming the prototype of buried hill at this time. During the sedimentary period of Dongying Formation, the structure reversed slightly, which is also known as the Dongying Movement. At this time, fault no. 2 strongly extended southward, and buried-hill was formed and basically formed. The research results have certain reference value for oil and gas exploration in Nanpu sag.