成都理工大学学报（自然科学版）2011，Vol.38Issue(2)：132-139,8.
鄂尔多斯盆地西北部盒8段浅水三角洲砂体成因及分布模式
Genesis and distribution pattern of shallow water delta sandbodies in Member 8 of Lower Shihezi Formation in the northwest of Ordos Basin
摘要
Abstract
Member 8 of Lower Shihezi Formation in the northwest of Ordos Basin is characterized by the regional tectonic setting with steady and slow subsidence, large area, gentle slope, relatively shallow water and multiple sources. The gentle slope-type shallow braided river delta is developed. The author takes the stratigraphic and sedimentary process-response dynamic principles as a theoretical basis, and uses the theory and technology of the high-resolution sequence stratigraphy to explore the genetic combination types of this kind of delta sandbodies. The sandbodies were evidently influenced by the relation between accommodations and sediment alimentations during the base-level up and down changes. The sandbodies in Member 8 consists of two vertical superposed types of progradation model and aggradation model from bottom to top. The progradation model mainly includes high-energy truncation style channels, low-energy truncation style channels, and deformity recombination which mouses bars at the bottom and under water distributary channels at the top; The aggradation model mainly includes low-energy truncation style channels, complete channels, downside deformity recombination which mouses bars at the bottom and under water distributary channels at the top. On the basis of the above analysis, the high energy channel sandbodies on the sequence boundary are abundant in lithological reservoirs in the delta plains which show the great potential for oil and gas exploration. Consequently, The genesis and distribution pattern of sandbodies in a gentle slope-type shallow braided river delta is established based on the spatial-temporal distribution of the sandbodies in Member 8 of the study area.关键词
浅水三角洲/砂体成因/分布模式/下石盒子组/鄂尔多斯盆地Key words
shallow water delta/ sandbody genesis/ distribution pattern/ Lower Shihezi Formation/ Ordos Basin分类
能源科技引用本文复制引用
李洁,陈洪德,林良彪,苏中堂,张成弓,程立雪,彭传利..鄂尔多斯盆地西北部盒8段浅水三角洲砂体成因及分布模式[J].成都理工大学学报（自然科学版）,2011,38(2):132-139,8.基金项目
国家自然科学基金重点项目(40739901) （40739901）
国家重大科技专项(2008ZX5002-001) （2008ZX5002-001）
