Abstract
ABSTRACT The gas formation of the lower Tertiary in the Dongpu Depression has been buried to a depth of over 3,500 m, and the gas reservoirs are low both in porosity and in permeability, Litkologic and lithofacies variations have played a controlling part in the reservoir's occurrence. The major gas-bearing belts are fanlike sandstone bodies in fan deltas and sublacustrine fans and stringlike sands in gravity flow channels, in which both porosity and permeability decreased with increasing compaction and cementation during burial diagenesis. Heterogeneous dissolution has taken place in the deep formations, and as a result two to three secondary porosity belts were developed at great depths: 2,600-3,000, 3,700-3,800, and 3,950-4,150 and even up to 5,600 m.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
