The Research On Sedimentary Microfacie Of Chang4+5~2, Chang6~1and Chang6~2in Nanniwan Oilfield, Xinyao Areas

In this paper, sedimentology, geology, well logging theory as a guide, based on the core observation and laboratory analysis, summarizes the various types of microfacies characteristics of the rock, log phase equal signs, from the vertical and horizontal analysis of the sand distribution characteristics, and research systematically on characteristics and flat distribution regulatation of sedimentary micro facie of chang4+52, chang61and chang62in Nanniwan oilfield, Xinyao areas and sedimentary facies.Studies have shown that sedimentary facie of chang4+52, chang61is chiefly delta plain, which is part of the delta deposits of the’land, the lithology is mainly sandstone, siltstone, mudstone, and the inter-distributary channel sand and river sand alternating layers of mud and peat bog deposits is characterized by a major distributary channel microfacies, river, and between the natural levee. chang4+52, chang6] curved strip of flat sand distribution patterns of lanes, and the distribution of instability, a large lateral variation; chang62are delta front, which is delta, the most developed area of sandstone to water well-developed distributary channel is characterized by deposition of sediment particles to the thickness of each layer of rock between the main lanes are curved strip of sand form plane distribution, and the horizontal distribution of small changes, more stable, the main sedimentary facies have underwater distributary channel, between the bay and the underwater distributary natural levee. Study area region is mainly underwater distributary channel sandstone deposits, exploration of the main objectives of the future.