Ctrl+F или ⌘-F

Research мethodology. Interpretation of the results of laboratory analyzes of core material, macro- and micro-
descriptions, well logging materials, with the linking of commercial horizons with paleontological data, as well as clarification of
the facies features of the Jurassic deposits, allow us to note the following features of the distribution and changes of reservoir
rocks:
1) poor consistency of monolithic sandstone layers, lenticular nature of their occurrence. The layers of the Lower
Jurassic are relatively more consistent than the horizons of the Middle Jurassic and have greater thicknesses (Kuanysh horizon);
2) predominantly low reservoir properties of sandy-siltstone rocks, the reasons for which are poor sorting, primary clay
content, intensive catagenetic transformations;
3) confinement of reservoirs with the best reservoir
properties to channel, coastal-marine and, probably, deltaic
facies.
In addition, there are no significant clear local structures
with a large amplitude in the study area that can control
hydrocarbon traps. First of all, this applies to the Barsakelmes
trough, and therefore low-amplitude or supposed folds are often
introduced for deep drilling, which ultimately give negative
results.
This makes it necessary to make adjustments in
determining the directions of exploration for further exploration
of hydrocarbons in the region.
Analysis and results. As the most promising direction,
based on the analysis of materials, the authors put forward the
Jurassic deposits of the northern side of the Kulbay trough, the
junction zone with the Aktumsuk system of dislocations, based
on the supposed similarity of the geological structure and
conditions of oil and gas formation and oil and gas accumulation
with the Sudochiy trough, where 9 gas condensate fields have
already been discovered, with total reserves exceeding 250
billion m3. Here it is possible to single out separate directions
associated with non-traditional (non-arched, tectonically and
lithologically shielded) traps (see fig. 1).
At present, the largest anticlinal deposits have already
been identified. In this regard, one of the tasks of seismic
exploration is the search for complex traps. With a wide variety
of lithological and stratigraphic pinchouts, conditions are created
for the existence of a significant number of types of non-
structural hydrocarbon traps. Unfortunately, this factor is not
sufficiently taken into account when conducting geological exploration and searching for hydrocarbon traps. Searches and
discoveries of deposits in non-anticline traps mainly occur by chance when searching for anticlinal structures. It is necessary that
these searches are not carried out along with the search for arched deposits, but purposefully and have their own scope of work.