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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
1Manuscript received April 12, 1996; revised manuscript received
July 16, 1997; final acceptance February 5, 1998.
2Texaco Inc., 3901 Briarpark, Houston, Texas 77042.
3Shengli Petroleum Administration Bureau, Dongying City,
Peoples Republic of China.
ABSTRACT
In this paper, we review the work presented at the AAPG-Shengli Petroleum
Administration Research Symposium dealing with lacustrine basin exploration
in China and southeast Asia. This meeting, held in the fall of 1995, revealed
that there has been an expansion of the available knowledge base associated
with these basins. This increase in information has resulted in a better
understanding of lacustrine basin-fill properties and characteristics,
even though many of the causal mechanisms
for these properties have not
yet been established. The many papers presented suggest that there are
two primary causes for economic failure within many of these basins: (1)
communication between source and
reservoir
and (2) the limited
reservoir
potential within the lacustrine sequence of these basins. More effective
petroleum systems are found in basins where marine sandstones are in communication
with lacustrine sources. The discussions also clearly demonstrated that
lacustrine basins are sensitive to environmental changes, causing complex
sedimentary facies successions. Each facies, however, displays unique characteristics
that can be mapped. Several presenters also suggested that within extensional
lacustrine settings the stratigraphic succession follows a distinct pattern.
Although most of these basins are predominantly oil prone, several lacustrine
basins within the region contain significant volumes of gas. Included within
these gas reserves are biogenic accumulations that appear to have formed
nearly penecontemporaneously with deposition. Recent work on several of
the Chinese basins suggests the possibility for immature hydrocarbon generation
and expulsion in a manner different than that associated with marine type
II-S kerogens. Even with the progress that this symposium revealed there
are several key questions that remain, including questions associated with
how technology might be used to improve the economics of many of these
systems that display limited
reservoir
potential.
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