- Repository URL:
- petroleum engineering.; Major petroleum engineering.
thesis / dissertation description
Net pay and permeability anisotropy are important parameters when making hydrocarbon reserves estimates. This research focused on the exploration of methods for estimating the net pay and permeability anisotropy of a heterogeneous hydrocarbon reservoir. I measured the permeability of two cored intervals of the McCall 25-9 well, located in the North Frisco City sandstone, Paramount field, Monroe County, Alabama, with a probe permeameter. To compare and contrast net-pay and permeability-anisotropy evaluations, and to assess the effect of measurement type and sampling strategy on the results, I used probe, core-plug, and log data. The permeability anisotropy of a hydrocarbon reservoir should be considered during the dynamic net-pay estimation. The ratio of vertical to horizontal permeability in a heterogeneous reservoir is very important since thin, low-permeability layers, which can form a barrier to vertical flow, may be present. The production forecast may be too optimistic if these layers are not taken into consideration. The net-pay variation depends on the measurement type. The probe measurements used here represent the heterogeneity of the reservoir better than core-plug and log measurements. A reduction in the sampling size did not really affect the probe, core-plug, or log measurements. For the net-pay and permeability-anisotropy evaluation of a hydrocarbon reservoir, the probe permeameter can be an inexpensive, useful device. Measurements can be taken without destruction of the core samples in a timely and cost-effective manner. In addition, this research indicated that the probe permeameter can detect thin, low-permeability intervals that usually cannot be detected during routine analysis of core plugs or log data.