GUY, WILLARD J., and LYNN W. WATNEY, Kansas Geological Survey, Lawrence, KS

ABSTRACT: Victory Field Producing Area, Haskell County, Kansas - An Interdisciplinary Reservoir Characterization

The Victory Field was discovered in 1960 based upon subsurface geology. It presently consists of 93 oil and gas wells that produce from multiple horizons from the Permian (2600'+/-) to the Mississippian (5300'+/-). Cumulative oil and gas production is 10.7 million barrels and 33.6 billion cubic feet, respectively. The Victory Field is located along a gentle south plunging anticline in the western Hugoton embayment of Kansas.

The primary reservoirs in the Victory Field are a succession of bioclastic and oolitic carbonate grainstones in the Upper Pennsylvanian (Missourian) Lansing-Kansas City groups at depths between 4100 and 4700 Feet. Reservoir quality and distribution are highly variable with the bioclastic grainstones most widespread. Oolitic zones are typified by moldic, vuggy, and interparticle porosity. The Lansing-Kansas City reservoirs occur in a series of upward shallowing carbonate depositional sequences, each sequence characterized by a vertical succession of four genetic units common to the carbonate platform.

The entrapment and accumulation of hydrocarbon in the Victory Field area is complicated by the combined influence of many subtle depositional, structural, and diagenetic factors. For example, parasequence-scale units compartmentalize reservoirs and impact diagenetic changes and resultant porosity development. Other heterogeneity results from the depositional facies mosaic. Furthermore, the hydrocarbon charging of these stacked discontinuous reservoirs appearsto be a significant factor leading to varied hydrocarbon saturations through-out the Victory Field. Charging inefficiency is thought to be the result of very gentle structural dips with little or no structural closure, and thin oil and gas columns coupled with erratic effective porosity distribution exhibiting differential capilla ity.

Recent field expansion has indicated that significant reserves can be added in a mature field in this period of low exploration activity. Studies of heterogeneous reservoirs such as the Victory Field should also lead to greater recovery of primary and secondary oil reserves.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.