Abstract
Sandy debrites transform into turbidites downslope the margin of the deep-lacustrine Late Triassic Chang 6 Oil Member of the Middle-Late Triassic Yanchang Formation in the Ordos Basin (central China). Recognizing such transformations can help predict the distribution of reservoir facies in the Huaqing Oil Field. Analysis of cores from 30 wells indicates that the sediments can be grouped in four major lithofacies representing, respectively, sandy debrites, sandy slumps, turbidites, and suspension settled mudstones. At the foot of a delta, commonly thick sandy debrites occur, implying progradation. Less thick sandy debrites dominate the lake margin, whereas turbidites dominate the lake center, where also fine-grained particles settled.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
