Midland Basin Wolfcamp Horizontal Development Greg Wilson January 14, 2015
What Makes RESOURCE PLAYS Work Organic Mudstones (basinal source rocks) Mappable (significant thickness & areal extent) Richness (generated oil in place) Repeatable (predictable results)
What Makes RESOURCE PLAYS Work Contd Thermal Maturity Hydrocarbon Generation (Oil / Wet Gas / Dry Gas) Reservoir Quality (porosity & permeability) Petrophysical Properties (identify, measure, analyze & map) Clay Volume (low to…
Wolfcamp Paleographical Map ERC N. Midland Basin Wolfcamp Shale Play ERC Fivestones Wolfcamp Shale Play ERC Delaware Basin Wolfcamp Shale Play WTGS, 03/08/2011, Midland, TX
Permian Basin Stratigraphic Column & Focus Plays Bulk of production comes from the Permian sequence Avalon Bone Spring Shale 1st Bn Sp Sand U Spraberry Major source rocks in the 2ndBn Sp Sand L Spraberry Ordovician,…
Reservoir Quality in a Resource Rock Intergranular and Intra-Kerogen Intergranular Reservoir space is a network of Rock Intergranular and Intra-Kerogen related pores molded into a complex geometry Porosity determination from…
Thermal Maturity Hydrocarbon Generation and Reservoir Quality % Ro (vitrinite reflectance) industry standard for maturity assessment Microscopic examination from cuttings/core samples Calculated to equivalent % Ro from…
Wolfcamp A Core Data Lavaca 38 5 Organic Silty Mudstone TOC = 2.0 4.6% (wt%) Ro (calc) = 0.85 0.9% Tmax = 445-449 (deg C) MINERALOGY by XRD (Lavaca 38 5 Well) 7618.5 7628.0 7633.5 7642.0 7653.0 Wolfcamp Total Clay = Avg 35%…
The Petrophysical Model The Petrophysical Model must be rooted in the rock, fit within the geologic framework, and be vetted against the production OOIP = (7758 * A * h * e * (1-Sw)) / Bo
Midland Basin Exploratory Drilling Program South Glasscock Wolfcamp A & B Results Andrews Martin Howard Mitchell Wolfcamp Play: Blue Outline ERC San Saba NS 37-48 204H Wolfcamp B 7,300 lateral Midland Glasscock 24 Hour Peak…
ERC Development Plan
Pad Drilling Minimizes land impacts Allows quicker rig moves Permits Zipper fracing More efficient facilities hookup Facilitates water recycling Image source: Laredo Petroleum
Development Pattern Maximizing the Resource
Development Pattern Current inter-well spacing N to S and S to N crossing wells A B A B 600 50 50 50 620 A B A B
Lateral Targets
S Midland Basin Lateral Schematic Current ERC Development Program Additional Potential Hz Targets
WC A Target 250 WC B Target Is 250 vertical separation too close for stacked laterals
WC A - Guadalupe 48 101H Gun-barrel view -67% of events in the Guadalupe well occurred within the A interval. If events above the A are ignored, 87% were in the A (vs 13% in the B). -High-density area of events in the A is 250…
WC B - San Saba NS 204H Gun-barrel view -68% of events in the San Saba well occurred within the B interval. If events above the A are ignored, 74% were in the B (vs 26% in the A), even with the reduced pressure in the adjacent…
So do the stacked wells communicate During the fracture stimulation: Yes. But, flowback and production characteristics suggest..not much.
Spacing: How close is close enough
Currently about 620 A B A B 600 50 50 50 620 A B A B
One way to find out: Spacing test 1 Mile A 620 420 B Two sets side by side, all parameters (length, stimulation, landing) the same except spacing
Development Pattern: The Next Step
More Pad Drilling Whats the best arrangement C Cline A B 700 50 50 50 A B C Cline
How many total horizons More to be tested. Potentially 6+ horizons per pad, 8 pads across a section, 48+ wells per section
Its going to get crowded out there (but only on the drilling pads) Photo from the American Petroleum Institute, via priweb.com
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