HIIP™ - VPP Module

VPP - Volumetric Post Processing

HIIP™ - Latest features include:

• Area depth information can now be calculated based on hydrocarbon column height as well as contact depth • New Probability Distribution Functions (PDF), have been added so that area depth calculations on either contact or column height do not need to be treated exclusively as a uniform distribution o ‘Slice’ through your prospect and see the area-depth information obtained using functions such as normal, log-normal and triangular o A brand new beta function has been added o Advantageous to use as it is a bounded distribution (unlike normal etc.) • A new layer model allows the stacking of as many reservoir or waste zone intervals as required for the prospect, allowing the building of a complex reservoir model for volumetric analysis The VPP module is the core interactive tool which allows the user to tackle any volumetric scenario. The geoscientist can specify “what if” scenarios taking into consideration possible fault seal, spillpoint, amplitude maps, contacts and stratigraphic trapping mechanisms as well as defining multiple reservoir and waste zone layers offset from the mapped horizon to the top reservoir. The grid input to VPP may be an existing deterministic top structure grid loaded to HIIP™, a depth converted grid generated within HIIP™ or you may have run multiple geostatistical realisations on either input using the GS module supplied with HIIP™. Whichever way, VPP rapidly computes volumes for your selected scenario. By setting up multiple Vpp objects, different geological assumptions can be modelled and stored. The scenarios you model in VPP are limited only by your imagination. You may have an oil or gas contact identified in a drilled well which you want to input. It may be a prospect yet to be drilled. You may have an oil-down-to (ODT) or water-up-to (WUT). All these (and more) can be incorporated into the scenario modelling . With a yet to drill target you can automatically compute the gross rock volume associated with the lowest closing contour. From the maximum fill you can then reduce the volume to account for partial fill by adjusting the contact or using the automatic area-depth slicing. To run an automatic spillpoint (lowest closing contour) calculation the user defines seed points. An Include seed is a point inside of the field or prospect outline and an Exclude seed is a point beyond the field or prospect. A seed can be a well or a control point digitized on the screen interactively. After specifying include and exclude positions the connectivity and autospill functions determine the maximum possible size of the prospect. With multiple realizations the batch controller rapidly applies your settings to all realizations, automatically computing the volumes. • Automatic Lowest Closing Contour (Spillpoint) • Verification against known contacts and automatic rejection of invalid solutions • Connectivity and Compartmentalisation Calculations • Fault Seal Constraints • Isoprobability Closure Mapping • Area Depth realization displays • WUT/ODT Constraints • Column Height Constraints • Contact PDF uncertanty • Gas column height proportions • Amplitide conformance statistics and constraint Volume calculations can include multiple polygons, volume reporting can then be per polygon as well as total volumes. Reservoir layering can be introduced through the layer model option. The user can specify a constant or can use a thickness grid. Waste zones can also be included, to account for offset between the mapped structure and the top of reservoir / porous zone. Any number of reservoir or waste zones can be stacked. Base reservoir grid is also offered which allows truncation in the connectivity calculations and provides the means for defining stratigraphic traps. HIIP™ also allows sets of geostatistical realisations for the reservoir thickness, waste zone / or base reservoir. Stratigraphic traps can also be defined using faults as barriers.   Using multiple geostatistical realisations as input the batch controller will automatically process all realisations and report the volumes from which P90, P50 and P10 probabilities can be calculated. In addition the Isoprobability closure map can be generated, showing the probability at any grid node of drilling within the closure. These maps, being based on connectivity, can also be used to estimate probability of structural dip compartmentalisation of the prospect or field. GS - Geostatistics Module The GS geostatistics object is used for computing SGS geostatistical simulations of the top base structure or thicknesses. The HIIP™ GS module is designed to be simple and easy to use for non-geostatisticians, requiring just 4 simple steps via an on-screen wizard. HIIP™ computes multiple realisations using the sequential Gaussian simulation (SGS) algorithm and stores the results ready for subsequent analysis in the VPP module. Grids created in HIIP™ can be exported to other packages through the industry standard formats supported. Geostats SGS simulation includes support for faults. The GS module also includes an automated tool for directional anisotropic variogram analysis and for variogram model fitting. The GS module now also includes simulation of thickness grids either as imported tied grids or as variability around a user-specified mean thickness value. When used with well data, the realisations are automatically tied to the well control points. However, geostatistical realisations can also be computed in the absence of wells, creating multiple geostatistical realisations for exploration scenarios too. Geostatistical capability includes: • Variogram Analysis and Modelling • Kriging and Standard Deviation Estimation with full support for faults • SGS conditional or non-conditional simulation with full support for faults       We hope you found this overview of VPP interesting and useful. If you have any further queries or wish to find out about the software release status, licensing or pricing please send an e-mail to:                                                    or call +44 (0) 1224 619 300

HIIP - Realising the prospects